Indiabix - CPI Flashcards
Oxidation of SO2 to SO3 is favoured by
A. low temperature and low pressure.
B. low temperature and high pressure.
C. high temperature and low pressure.
D. high temperature and high pressure
B. low temperature and high pressure.
Gun powder, which is an explosive comprises of charcoal,
sulphur and
A. glycerene
B. salt petre
C. nitro glycerene
D. dynamite
B. salt petre
Starting raw material for the manufacture of alum is
A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate
C. bauxite
Salt cake is chemically represented by
A. Na2SO4
B. CaSO4.H2O
C. MgSO4
D. BaSO4
A. Na2SO4
Which of the following sugars is the sweetest?
A. Glucose
B. Fructose
C. Sucrose
D. Lactose
B. Fructose
Paper pulp produced by kraft/sulphate process is
A. bleached easily
B. dull white in color
C. strong fibrous
D. dark colored
C. strong fibrous
Claude process of gas liquefaction employs
A. merely compression of gas beyond its critical
pressure.
B. Joule-Thomson expansion cooling.
C. heat exchange with colder stream.
D. adiabatic expansion against a piston or in a turbine.
D. adiabatic expansion against a piston or in a turbine.
The main use of HCl is in the
A. drilling of petroleum wells and pickling of steel sheets.
B. manufacture of cationic detergent.
C. treatment of spent fuel of nuclear reactor.
D. none of these.
A. drilling of petroleum wells and pickling of steel sheets.
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
A. exothermic
B. endothermic
C. catalytic
D. autocatalytic
B. endothermic
Viscose rayon is chemically
A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate
D. regenerated cellulose acetate
All enzymes are made of
A. fats
B. carbohydrates
C. proteins
D. amino acids
C. proteins
The combustion reaction, C + O2 = CO2, is
A. exothermic
B. endothermic
C. autocatalytic
D. none of these
A. exothermic
Styrene is produced from ethyl benzene by the process of
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration
A. dehydrogenation
Gelatin which is a nitrogenous organic protein is obtained by the hydrolysis of
A. collagen
B. tannin
C. molasses
D. carbohydrate
A. collagen
The chamber process is
A. preferred over contact process for producing 98 to 100% H2SO4 and various oleums.
B. non-catalytic and operates only on pyrites.
C. a batch process for directly producing high
strength (98 to 100%) H2SO4.
D. none of these.
D. none of these.
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
A. 1 - 2
B. 15 - 20
C. 50 - 60
D. 80 - 85
B. 15 - 20
Fusel oil is a/an
A. essential oil.
B. extract from medicinal herbs.
C. mixture of higher molecular weight alcohols
(a by-product obtained during production of
alcohol from molasses).
D. none of these.
C. mixture of higher molecular weight alcohols
(a by-product obtained during production of
alcohol from molasses).
Styrene-butadiene-rubber (SBR) as compared to natural rubber has
A. Poorer tensile strength.
B. poorer resistance to oxidation.
C. greater amount of heat build-up under heavy
loading.
D. all (a), (b) and (c)
D. all (a), (b) and (c)
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A. CaO
B. MnO2
C. ZnO
D. FeS
C. ZnO
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
A. dilute H2SO4
B. oleum
C. ultraviolet light
D. none of these
B. oleum
Hemoglobin is a/an
A. amino acid
B. biological catalyst
C. protein
D. enzyme
C. protein
Epoxy resin
A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.
A. is a good adhesive.
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
C. 50
Which of the following is the most adverse factor
challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A. High cost of mercury.
B. High specific gravity of mercury.
C. Non-availability of high purity mercury.
D. Pollution of water stream by mercury.
D. Pollution of water stream by mercury.
Esterification reaction produces
A. detergent
B. vanaspati
C. soap
D. mercaptans
C. soap
Wood charcoal is used for decolouration of sugar,
because it __________ the coloured materials.
A. adsorbs
B. oxidises
C. reduces
D. converts
A. adsorbs
Producer gas consists mainly of
A. CO, CO2 N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H2
A. CO, CO2 N2, H2
Neoprene is the trade name of
A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber
C. polychloroprene
Hard water
A. does not affect the lather formation by soap.
B. is not unfit for drinking purpose.
C. pollutes the water stream.
D. all (a), (b) and (c).
B. is not unfit for drinking purpose.
Which of the following is an organo-metal-lic compound ?
A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene
B. Tetra-ethyl lead
Sulphur addition in soap is done to
A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.
B. cure pimples & dandruff.
Phosphate rock is a raw material for the manufacture of
A. phosphoric acid
B. phosphorous
C. superphosphates
D. all (a), (b) and (c)
D. all (a), (b) and (c)
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
A. poor oxidation stability and high gum forming
tendency.
B. greater tendency of decomposition at elevated
temperature.
C. hydrolysis tendency in presence of water.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Which of the following is not a raw material used for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica
A. Iron oxide
Esterification reaction
A. produces soap.
B. is reversible.
C. is a reaction between an alcohol and an organic
acid.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
In sulphate pulp manufacture, the pressure and
temperature in the digestor is
A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 - 180°C
D. l atm., 800°C
B. 10 atm., 170-180°C
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
A. calcium sulphate
B. sodium chloride
C. sodium sulphate
D. magnesium chloride.
B. sodium chloride
Pick out the endothermic reaction out of the following.
A. C+O2 = CO
B. CO + 3H2 = CH4 + H2O
C. CaCO3 = CaO + CO2
D. CO +O2 = CO2
C. CaCO3 = CaO + CO2
Pasteurisation of milk means
A. removal of fatty and albuminous substance from it.
B. killing of organisms present in it by heating it
at controlled temperature without changing
its natural characteristics.
C. inhibiting the growth of micro-organisms without killing them.
D. none of these.
B. killing of organisms present in it by heating it
at controlled temperature without changing
its natural characteristics.
Fusion of bauxite and __________ produces high
alumina cement.
A. alum
B. limestone
C. coke
D. quartz
B. limestone
__________ process is used for the manufacture of
sodium carbonate by ammonia soda process.
A. Ostwald’s
B. Bosch
C. Solvay
D. Haber’s
C. Solvay
Polycaprolactum is commercially known as
A. nylon-6
B. nylon-66
C. dacron
D. rayon
A. nylon-6
Frasch process is for
A. making oxygen
B. producing helium
C. mining sulphur
D. making nitrogen
C. mining sulphur
Very fine suspended and colloidal impurities are removed from water by a process called
A. sedimentation
B. coagulation
C. disinfection
D. softening
B. coagulation
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
A. its calorific value is very less.
B. tar neutralises the residual acids present in pitch.
C. it reduces viscosity and imparts fluidity for its
transportation through pipelines at economic
pressure drop.
D. all (a), (b) and (c).
C. it reduces viscosity and imparts fluidity for its
transportation through pipelines at economic
pressure drop.
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
A. C
B. CO
C. CO2
D. H2
B. CO
Raw materials used for producing __________ cement does not contain iron oxide.
A. waterproof
B. slag
C. white
D. pozzolan
C. white
The drug used in contraceptives is
A. sulphadizene
B. mestranol
C. methyl salicylate
D. pencillin
B. mestranol
Neon gas is
A. flammable in nature.
B. used in color discharge tube.
C. filled in lamps having tungsten filament.
D. all (a), (b) and (c).
B. used in color discharge tube.
Calgon used in water treatment is chemically
A. sodium phosphate
B. sodium hexametaphosphate
C. calcium phosphate
D. tricresyl phosphate
B. sodium hexametaphosphate
Which oil is preferred for paint manufacture?
A. Drying oil
B. Non-drying oil
C. Semi-drying oil
D. Saturated oil
A. Drying oil
Styrene butadiene rubber (SBR) is
A. a natural rubber.
B. a synthetic polymer.
C. a synthetic monomer.
D. another name of silicone rubber.
B. a synthetic polymer.
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
A. 1 atm & 100°C
B. 5 atm & 275°C
C. 100 atm & 500°C
D. 50 atm & 1000°C
B. 5 atm & 275°C
Glycerine is not used in the
A. manufacture of explosive.
B. conditioning and humidification of tobacco.
C. manufacture of pharmaceuticals.
D. none of these.
D. none of these.
Cumene is the starting material for the production of
A. benzoic acid
B. phenol and acetone
C. isoprene
D. styrene
B. phenol and acetone
The type of high refractive index glass used in optical instruments is __________ glass.
A. pyrex
B. flint
C. crookes
D. none of these
B. flint
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
A. nickel
B. vanadium
C. alumina
D. iron
B. vanadium
Most commonly used rubber vulcanising agent is
A. sulphur
B. bromine
C. platinum
D. alumina
A. sulphur
Terylene is
A. same as dacron
B. a polyester
C. both (a) & (b)
D. neither (a) nor(b)
C. both (a) & (b)
Free alkali in a toilet soap is __________ that in a
laundary shop.
A. less than
B. more than
C. same
D. none of these
A. less than
Dehydrogenation of isopropanol produces
A. propyl alcohol
B. acetone
C. trichloroethylene
D. formaldehyde
B. acetone
Pick out the wrong statement.
A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
B. Soap powder is prepared by mixing soap with
hydrated sodium carbonate.
C. Detergents differ from soaps in their action in hard water.
D. Tarnish inhibitor (e.g., benzotriazole) is added
in soap to facilitate the removal of stains due
to tea, blood etc.
D. Tarnish inhibitor (e.g., benzotriazole) is added
in soap to facilitate the removal of stains due
to tea, blood etc.
Concentration of hydrogen peroxide is done by
A. crystallisation
B. vacuum crystallisation
C. atmospheric distillation
D. dehydration
B. vacuum crystallisation
Helium is produced on commercial scale from
A. air
B. natural gas
C. coke oven gas
B. natural gas
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
A. 20 - 30
B. < - 5
C. 100 - 150
D. 250 - 300
A. 20 - 30
The catalyst used in the manufacture of DDT is
A. alumina.
B. silica.
C. 20% oleum.
D. aluminium chloride
C. 20% oleum.
Most widely and commonly used coagulant for the removal of suspended impurities in water is
A. bleaching powder
B. slaked lime
C. alum
D. copper sulphate
C. alum
__________ is used as a catalyst in fat splitting.
A. ZnO
B. Ni
C. V2O5
D. FeO
A. ZnO
Which of the following is not produced on commercial scale from sea water?
A. Bromine.
B. Magnesium compounds.
C. Potassium compounds.
D. Sodium sulphate.
D. Sodium sulphate.
Heating of __________ to 120°C, produces plaster of
paris.
A. blue vitriol
B. gypsum
C. calcium silicate
D. calcium sulphate
B. gypsum
Pick out the wrong statement.
A. Conversion of SO2 to SO3 in Monsanto-4 pass
converter is about 98%.
B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide.
C. Vitriol oil is nothing but technical sulphuric acid.
D. Decomposition of sulphuric acid on heating
does not start before its boiling.
D. Decomposition of sulphuric acid on heating
does not start before its boiling.
Which of the following has sodium bicarbonate as its main constituent?
A. Baking soda
B. Baking powder
C. Washing soda
D. none of these
B. Baking powder
Ordinary glass is not a/an
A. amorphous isotropic material.
B. supercooled liquid.
C. material with sharp definite melting point.
D. electrical insulator
C. material with sharp definite melting point.
In premitive days, __________ was being manufactured by Leblanc Process.
A. alum
B. washing soda
C. soda ash
D. calcium carbide
C. soda ash
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
A. SASOL (in South Africa).
B. Redcar (U.K.).
C. Los-Angles (U.S.A.).
D. Trombay (India).
A. SASOL (in South Africa).
Lurgi coal gasifier is a pressurised __________ bed
reactor.
A. moving
B. fixed
C. fluidised
D. entrained
A. moving
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
A. cause cholesterol build up and blood clotting.
B. are prone to rancid oxidation.
C. always contain some amount of nickel (as their
complete removal is very difficult).
D. have affinity to retain harmful sulphur
compounds.
A. cause cholesterol build up and blood clotting.
Paper grade bamboo contains about __________ percent
cellulose.
A. 5
B. 20
C. 40
D. 60
A. 5
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
A. surfactant
B. builder
C. optical brightening agent
D. anti soil redeposition agent
D. anti soil redeposition agent
Vulcanisation of rubber
A. decreases its tensile strength.
B. increases its ozone & oxygen reactivity.
C. increases its oil & solvent resistance.
D. converts its plasticity into elasticity.
D. converts its plasticity into elasticity.
Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
A. salt, limestone and coke or gas.
B. ammonia, salt and limestone.
C. ammonia limestone and coke.
D. none of these.
A. salt, limestone and coke or gas.
Chloral is used in the manufacture of
A. DDT
B. BHC
C. parathion
D. none of these
A. DDT
Bromine is used in the preparation of
A. fire extinguishing compounds.
B. fire proofing agents.
C. dyes and antiknock compounds.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Sudden temperature fluctuation does not affect pyrex glass, because of its
A. low co-efficient of expansion.
B. high co-efficient of expansion.
C. high melting point.
D. both (b) and (c).
A. low co-efficient of expansion.
The process used for the manufacture of ethyl alcohol from molasses is
A. distillation
B. dehydration
C. dehydrogenation
D. none of these
D. none of these
Absorption of SO3 in 97% H2SO4 is
A. exothermic
B. endothermic
C. not possible
D. none of these
A. exothermic
__________ process is used for the commercial
production of nitric acid by the catalytic oxidation of ammonia.
A. Solvay
B. Ostwald’s
C. Haber’s
D. none of these
B. Ostwald’s
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
A. fertiliser manufacture
B. car battery solution
C. synthesis of oleum
D. water treatment
B. car battery solution
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
A. alumina
B. silica gel
C. platinum
D. nickel
A. alumina
A good quality coal should have
A. low fusion point of ash
B. high ash content
C. high sulphur content
D. none of these
D. none of these
Zeolite used in water softening process (cation exchange) is regenerated by washing with
A. brine
B. chloramines
C. sodium bisulphite
D. liquid chlorines
A. brine
The catalyst used in shift converter is
A. nickel
B. vanadium
C. silica gel
D. alumina
A. nickel
Which of the following is a detergent?
A. Benzene hexachloride
B. Alkyl benzene sulphonate
C. Polytetraflouroethylene
D. Cellulose nitrate
B. Alkyl benzene sulphonate
Drinking (potable) water treatment does not involve
A. coagulation
B. sedimentation
C. softening
D. disinfection
C. softening
Phenol formaldehyde resin is used as an adhesive in making
A. laminates
B. card boxes
C. furniture
D. books
A. laminates
Pick out the correct statement.
A. A fat is converted into oil by its hydrogenation.
B. There is no difference between a fat and an oil so far as its physical properties are concerned.
C. All vegetable oils except coconut oil, contains
fatty acids having more than sixteen carbon
atoms.
D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.
C. All vegetable oils except coconut oil, contains
fatty acids having more than sixteen carbon
atoms.
DDT should not be allowed to come in contact with iron (during its manufacture) to
A. avoid its decomposition.
B. prevent sulphonation of the monochlorobenzene by the acid catalyst.
C. achieve non-hygroscopic property.
D. none of these
A. avoid its decomposition.
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
A. V2O5 & Cr2O3.
B. oxides of nitrogen & Cr2O3.
C. V2O5 on a porous carrier & oxides of nitrogen.
D. oxides of nitrogen & V2O5 on a porous carrier.
D. oxides of nitrogen & V2O5 on a porous carrier.
DDT stands for
A. diethyl-diphenyl-trichloromethane.
B. dichloro-diphenyl-trichloromethane.
C. diphenyl-dichloro-trichloromethane.
D. dichloro-diphenyl-trichloroethane.
D. dichloro-diphenyl-trichloroethane.
Phosphoric acid is prepared from
A. cryolite
B. chalcopyrite
C. rock phosphate
D. none of these
C. rock phosphate
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
A. as a lubricant.
B. as a rust preventive.
C. in hard water for cleaning of cloth.
D. as a foam depressant in distillation column.
A. as a lubricant.
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
A. Diaphragm electrolytic cell process
B. Mercury electrolytic cell process
C. Lime-soda process
D. None of these
C. Lime-soda process
Bleaching action of bleaching powder is due to its
__________ properties.
A. reducing
B. oxidising
C. disinfecting
D. none of these
B. oxidising
Solvent extracted oil
A. has low free fatty acid content.
B. is odourless.
C. has more of unsaturates.
D. none of these.
D. none of these.
Which of the following is not required in the manufacture of soda ash by Solvay process ?
A. Ammonia
B. Limestone
C. Nitric acid
D. None of these
C. Nitric acid
Saponification number of an oil or fat
A. gives an idea about its molecular weight.
B. is inversely proportional to its molecular weight.
C. detects its adulteration.
D. all (a), (b) & (c)
D. all (a), (b) & (c)
The purpose of tanning in leather industry is to
A. stiffen the leather.
B. smoothen the leather.
C. make it flexible.
D. impart water resistance.
A. stiffen the leather.
Lime and soda ash are added to water to remove
A. bicarbonates & sulphates of calcium and
magnesium.
B. undersirable taste and odour.
C. bacteria.
D. its corrosiveness.
A. bicarbonates & sulphates of calcium and
magnesium.
Kaoline is a/an
A. refractory material
B. synthetic resin
C. artificial abrasive
D. blue pigment
A. refractory material
Hydrogenation of edible vegetable oils
A. is an exothermic reaction.
B. increases their melting point.
C. is done in presence of nickel catalyst.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Phenol is mainly used
A. to produce benzene.
B. to produce phenol formaldehyde.
C. to produce polyester resin.
D. as a plasticiser for unsaturated polyster.
B. to produce phenol formaldehyde.
Main constituent of dolomite is
A. CaCO3
B. MgCO3
C. K2CO3
D. Na2CO3
B. MgCO3
Conversion of CO to CO2 by steam in presence of a catalyst is called
A. steam reforming.
B. shift conversion.
C. steam gasification.
D. none of these.
B. shift conversion.
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
A. L.D. converter
B. blast furnace
C. rotary kiln
D. recuperator
D. recuperator
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
A. SO3
B. Cl2
C. NH3
D. SO2
B. Cl2
Plasticisers are added to paints to
A. make it corrosion resistant.
B. make glossy surface.
C. give elasticity & prevent cracking of the film.
D. increase atmospheric oxidation.
C. give elasticity & prevent cracking of the film.
Resistance to fusion of the refractory under a steady rising temperature condition is called
A. spalling
B. refractoriness
C. both (a) & (b)
D. neither (a) nor (b)
B. refractoriness
Portland cement consists mainly of
A. CaO & SiO2
B. SiO2 & Al2O3
C. CaO & Al2O3
D. CaO & Fe2O3
A. CaO & SiO2
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
A. Pyrex
B. Soda lime
C. Lead
D. High silica
A. Pyrex
The amount of benzene present in pure benzol is about __________ percent.
A. 30
B. 50
C. 70
D. 90
C. 70
Cumene (isopropyl benzene) is made by
A. oxidation of napthalene.
B. propylene alkylation of benzene.
C. polymerisation of a mixture of benzene &
propylene.
D. none of these.
B. propylene alkylation of benzene.
Which of the following is not a pyrite ore?
A. Celestite
B. Galena
C. Gypsum
D. Siderite
D. Siderite
Mannheim furnace is used in the manufacture of
A. hydrochloric acid.
B. H2SO4 by Chamber process.
C. calcium carbide.
D. corundum.
A. hydrochloric acid.
Thermosetting materials
A. are cross-linked molecules.
B. soften on application of heat.
C. are solvent soluble.
D. none of these.
A. are cross-linked molecules.
Pick out the wrong statement. Iodine value of an oil or fat is
A. the number of grams of iodine taken up by 100
gm of oil or fat.
B. a measure of its unsaturation.
C. helpful in findings its adulteration & its suitability for making soap.
D. independent of the type of oil, whether it is
drying or non-drying
D. independent of the type of oil, whether it is
drying or non-drying
Nickel is not used as a catalyst in the
A. Fischer-Tropsch process.
B. shift conversion.
C. hydrogenation of oil.
D. Ostwald’s process of HNO3 manufacture.
D. Ostwald’s process of HNO3 manufacture.
__________ iron is the purest form of iron.
A. Cast
B. Wrought
C. Pig
D. High silicon
B. Wrought
Enamels
A. give good glossy finish.
B. are same as varnish.
C. are prepared from non-drying oil.
D. do not contain pigment.
A. give good glossy finish.
Black liquor is converted into white liquor by
A. evaporation and burning the concentrate
followed by causticisation of products.
B. multi-effect evaporation only.
C. selective liquid extraction.
D. extractive distillation
A. evaporation and burning the concentrate
followed by causticisation of products.
Varnish does not contain
A. thinner
B. pigment
C. both (a) & (b)
D. neither (a) nor (b)
B. pigment
Alcohol is produced by the
A. oxidation of an aldehyde
B. hydrolysis of an ether
C. esterification of a fat
D. none of these
B. hydrolysis of an ether
Varnish does not contain
A. pigment
B. thinner
C. dryer
D. anti-skimming agent
A. pigment
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
A. polyurethane
B. silicone
C. teflon
D. epoxy resin
C. teflon
Solvent used for extraction of oil is
A. hexane
B. methyl ethyl ketone
C. furfurol
D. none of these
A. hexane
Insulin is an __________ drug.
A. anti-malarial
B. anti-TB
C. antibiotic
D. none of these
C. antibiotic
Liquor poisoning generally occurs due to the presence of __________ in it.
A. ethyl alcohol
B. impurities
C. methyl alcohol
D. carbonic acid
C. methyl alcohol
Neoprene is chemically known as
A. polybutadiene
B. styrene butadiene rubber (SBR)
C. polyurathane
D. polychloroprene
D. polychloroprene
Pick out the wrong statement.
A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%.
B. Contact process of sulphuric acid manufacture
produces pure acid of concentration ≥ 98%.
C. 75% oleum can be produced by distillation of 20% oleum.
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst.
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Pick out the wrong statement.
A. Catalytic hydrogenation of carbon monoxide
produces methyl alcohol.
B. In nylon-6, the number 6 represents the total
number of carbon atoms in the ring.
C. Raw materials for DDT manufacture are
benzene and chlorine.
D. Ethanolamines are produced by using ammonia
and ethylene oxide as raw material.
C. Raw materials for DDT manufacture are
benzene and chlorine.
Molecular weights of polymers are in the range of
A. 10^2 - 10^2
B. 10^5 - 10^9
C. 10^2 - 10^7
D. 10^9 - 10^11
C. 10^2 - 10^7
Sulphur removal by heating of pyrite ore in presence of air is called its
A. reduction
B. roasting
C. calcination
D. smelting
B. roasting
Deacon’s method is used for the manufacture of
A. glauber’s salt
B. common salt
C. chlorine
D. graphite electrode
C. chlorine
Pick out the true statement pertaining to water treatment.
A. Slow sand filters can remove colour completely.
B. Activated carbon can be used for taste & odour
control without subsequent filtration.
C. Application of activated carbon reduces the
temporary hardness of water.
D. Normally, the turbidity is removed by adding
a coagulent prior to sedimentation.
D. Normally, the turbidity is removed by adding
a coagulent prior to sedimentation.
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
A. lead
B. borosilicate
C. soda lime
D. alkali silicate
B. borosilicate
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
A. nitric acid
B. hydrochloric acid
C. methyl alcohol
D. formic acid
A. nitric acid
The most stable allotropic form of phosphorous is the __________ phosphorous.
A. white
B. black
C. yellow
D. red
B. black
Function of thinner in a paint is to
A. accelerate the oxidation of oil.
B. prevent gelling of the paint.
C. suspend pigments & dissolve film forming
materials.
D. form a protective film.
C. suspend pigments & dissolve film forming
materials.
Starting material for the production of styrene butadiene rubber (SBR) is
A. ethyl alcohol
B. ethylene
C. both (a) & (b)
D. neither (a) nor (b)
C. both (a) & (b)
Which one of the following is not an elastomer?
A. Polyisoperene
B. Neoprene
C. Nitrile-butadiene
D. None of these
D. None of these
Which of the following processes can remove both
temporary as well as permanent hardness of water?
A. Filtration
B. Boiling
C. Distillation
D. None of these
C. Distillation
Dacron is a
A. condensation product of hexam-ethylene diamine and adipic acid.
B. thermosetting material.
C. condensation product of dimethyl terephthalate and ethylene glycol.
D. none of these.
D. none of these.
Rancidity of the fatty oil can be reduced by its
A. decoloration
B. hydrogenation
C. oxidation
D. purification
B. hydrogenation
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A. high cost
B. fragile nature
C. easy poisoning tendency
D. all (a), (b) and (c)
D. all (a), (b) and (c)
__________ of rubber decreases after its vulcanisation.
A. Resistance to the action of organic solvent
B. Tackiness
C. Maximum service temperature
D. Tensile strength
B. Tackiness
Boiling of water containing temporary hardness produces
A. CO2
B. CaSO4
C. CaHCO3
D. none of these
A. CO2
Phenol formaldehyde
A. employs addition polymerisation.
B. employs condensation polymerisation.
C. is a monomer.
D. is an abrasive material.
B. employs condensation polymerisation.
Which of the following is not an insecticide?
A. Hydrocyanic acid
B. Nicotine
C. Sodium flouride
D. Hexane
D. Hexane
Shrinkage volume in cement setting does not depend upon the
A. sand to cement ratio.
B. water to cement ratio.
C. ambient temperature fluctuation.
D. drying period.
A. sand to cement ratio.
Bisphenol A is produced by the condensation of acetone with
A. formaldehyde
B. ethyl alcohol
C. diethyl ether
D. phenol
D. phenol
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
A. sodium sulphide & sodium carbonate.
B. sodium sulphite & sodium carbonate.
C. sodium sulphite & sodium sulphide.
D. none of these.
A. sodium sulphide & sodium carbonate.
Presence of carbonaceous matter in the sewage
A. causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures.
B. reduces sulphate ions to sulphides causing
obnoxious smell.
C. increases the quantity of chlorine used for its
purification.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
A mineral is termed as ‘ore’, if
A. a metal can be economically extracted from it.
B. it contains ≥ 40% metal.
C. the metal present in it is costly.
D. all (a), (b) and (c).
A. a metal can be economically extracted from it.
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
A. gives higher conversion efficiency.
B. has a longer life and is not poisoned by arsenic.
C. handles lower SO2 content gas (7 -10% SO2),
thus increasing the capital cost of the plant.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system )
A. P
B. P^1/2
C. P2
D. 1/P
B. P^1/2
Oleum produces fumes of
A. SO2
B. H2SO4
C. SO3
D. SO2 + H2SO4
C. SO3
20% oleum means that in 100 kg oleum, there are 20 kg of
A. SO3 and 80kg of H2SO4.
B. H2SO4 and 80kg of SO3.
C. SO3 for each 100 kg of H2SO4.
D. none of these.
A. SO3 and 80kg of H2SO4.
Chloramines are used in water treatment for
A. disinfection and control of taste & odour.
B. corrosion control.
C. removing turbidity.
D. control of bacteria.
A. disinfection and control of taste & odour.
Glycerine is recovered from lye by
A. evaporation followed by vacuum distillation.
B. liquid extraction technique.
C. extractive distillation technique.
D. none of these.
A. evaporation followed by vacuum distillation.
Inversion of sucrose produces
A. fructose
B. glucose
C. both (a) & (b)
D. neither (a) nor (b)
B. glucose
Enzymes are organic catalysts used in the __________ reactions.
A. chemical
B. biochemical
C. photochemical
D. electrochemical
B. biochemical
Linde process of gas liquefaction employs
A. exchange of heat with colder stream.
B. adiabatic expansion through a throttle valve
(Joule-Thomson expansion).
C. adiabatic expansion against a piston or in a
turbine.
D. merely compressing the gas beyond its critical
pressure.
B. adiabatic expansion through a throttle valve
(Joule-Thomson expansion).
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
A. 10
B. 50
C. 80
D. 95
B. 50
Ore concentration by froth floatation utilises the
__________ of ore particles.
A. density difference
B. wetting characteristics
C. terminal velocities
D. none of these
B. wetting characteristics
The main use of activated carbon in water treatment is to control
A. bacterial growth
B. taste and odour
C. turbidity
D. none of these
B. taste and odour
The most commonly used substance to speed up the sedimentation of sewage is
A. lime
B. sulphuric acid
C. chlorine
D. sodium bisulphite
A. lime
Sucrose is a
A. monosacchride
B. disacchride
C. polysacchride
D. none of these
B. disacchride
Sugar content in sugarcane on cane basis is about
__________ percent by weight.
A. 1 to 5
B. 5 to 10
C. 15 to 20
D. 20 to 30
B. 5 to 10
Pick out the wrong statement.
A. Wine, rum & Vodka are prepared by the
formulation of fruit juice, sugar beet & rye
respectively.
B. Protein catalysts are called enzymes.
C. The rate of chemical reaction is independent of
the concentration of reactants at high
concentration of enzymes.
D. Total sugar content in molasses is about 10%.
D. Total sugar content in molasses is about 10%.
The major use of butadiene is
A. as a plasticiser for unsaturated polyester.
B. in the manufacture of synthetic rubber.
C. as an anti-skinning agent in paint.
D. none of these.
B. in the manufacture of synthetic rubber.
The manufacture of Kraft pulp is done by a/an
__________ process.
A. alkaline
B. acidic
C. neutral
D. none of these
A. alkaline
Antibiotic
A. inhibits/destroys the growth of
microorganisms.
B. is used as a pain reliever.
C. is an antimalarial.
D. is an anaesthetic.
A. inhibits/destroys the growth of
microorganisms.
Which of the following paper does not require a filler during manufacture ?
A. Bond paper
B. Writing paper
C. Blotting paper
D. Coloured paper
C. Blotting paper
Industrial production of chloroform requires acetone and
A. phosgene
B. calcium hypochlorite
C. chlorine
D. ammonium chloride
B. calcium hypochlorite
Styrene (a monomer for the production of polystyrene) is commercially produced by
A. catalytic dehydrogenation of ethyl benzene.
B. dehydration of ethyl alcohol followed by
hydrogenation.
C. reacting ethylene oxide with acetal-dehyde.
D. fermentation of starch.
A. catalytic dehydrogenation of ethyl benzene.
Hydrogenation of oil takes place in a/an __________
reactor.
A. autothermal
B. trickle bed
C. plug flow
D. none of these
B. trickle bed
Fatty material used in soap making is
A. fatty acid
B. fatty alcohols
C. tallow
D. detergents
C. tallow
__________ glass is used for the manufacture of optical
glass.
A. Pyrex
B. Soda
C. Flint
D. Crooke’s
C. Flint
Thermosetting plastic materials
A. can be repeatedly melted.
B. is useful for melt casting.
C. can not be melted after forming.
D. is useful for spinning.
C. can not be melted after forming.
Favourable conditions for the liquefaction of gases in general are
A. high pressure & low temperature.
B. low pressure & high temperature.
C. high pressure & high temperature.
D. low pressure & low temperature
A. high pressure & low temperature.
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
A. furnace → converter → absorber
B. furnace → evaporator → absorber
C. furnace → converter → evaporator
D. converter → furnace → absorber
A. furnace → converter → absorber
__________ nature of hypo (sodium thiosulphate) makes it useful in photography.
A. Oxidising
B. Reducing
C. Complex forming
D. Photochemical
C. Complex forming
__________ is an ore of lead.
A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite
B. Galena
Which of the following is an yellow pigment ?
A. Titanium dioxide
B. Ferrous sulphate
C. Lead chromates
D. Zinc sulphides
C. Lead chromates
Catalytic oxidation of toluene produces
A. styrene
B. phenol
C. benzene
D. tri-nitro-toluene
B. phenol
SO2 is bubbled through hot sugar cane juice to
A. act as an acidifying agent.
B. increase its concentration.
C. increase the amount of molasses.
D. increase the crystal size.
A. act as an acidifying agent.
The noble gas which occurs most abundantly in the atmosphere is
A. helium
B. neon
C. krypton
D. argon
D. argon
Production of alcohol by fermentation ofmolasses is an __________ process.
A. anaerobic
B. aerobic
C. endothermic
D. both(b) and (c)
B. aerobic
Main constituents of portland cement are calcium
aluminate and
A. gypsum
B. silicates
C. sodium silicate
D. carbonates
B. silicates
Pick out the wrong statement.
A. High early strength cement are made from
materials having high silica to lime ratio.
B. The function of gypsum in cement is to enhance its initial setting rate.
C. Acid resistant cements are known as silicate
cement.
D. Major component of greyish portland cement is
tricalcium silicate
A. High early strength cement are made from
materials having high silica to lime ratio.
Common salt is generally not produced commonly by __________ method from brine.
A. freeze drying
B. electrolytic
C. solar evaporation
D. vacuum evaporation
A. freeze drying
Which of the following is a detergent ?
A. Fatty alcohol
B. Alkyl benzene sulphonate (ABS)
C. Fatty acids
D. Methylene chloride
B. Alkyl benzene sulphonate (ABS)
Sulphuric acid is mainly used in the __________ industry.
A. fertiliser
B. steel
C. paper
D. paint
A. fertiliser
Pick out the wrong statement pertaining to nitric acid.
A. About 90% of nitric acid is manufactured by
Ostwald’s process.
B. It is a strong mono basic acid which reacts with
almost all the metals except noble metals.
C. Yellow color of impure nitric acid is because of
dissolved oxides of nitrogen (mainly NO2).
D. Arc process of nitric acid manufacture is
economical as compared to Ostwald’s
process.
D. Arc process of nitric acid manufacture is
economical as compared to Ostwald’s
process.
Alcohol percentage in molasses may be around
A. 10
B. 40
C. 70
D. 85
B. 40
Main use of hydrazine is
A. as a rocket fuel
B. in water treatment
C. as a disinfectant
D. as fire retardant
A. as a rocket fuel
Main use of liquid nitrogen is in
A. rocket propulsion.
B. making gun powder.
C. detergent manufacture.
D. refrigerative cooling.
D. refrigerative cooling.
Comparing sulphate process with sulphite process, we find that __________ in the later.
A. both temperature & pressure in the former is less than that
B. both temperature & pressure in the former is
more than that
C. temperature is more in the former whereas
pressure is more
D. pressure is more in the former whereas
temperature is less
B. both temperature & pressure in the former is
more than that
Which of the following is a disacchride ?
A. Sucrose
B. Glucose
C. Starch
D. Maltose
A. Sucrose
__________ is produced using polycondensation
reaction.
A. Polythene
B. Phenol formaldehyde
C. Poly vinyl chloride
D. none of these
B. Phenol formaldehyde
Raw materials required for the manufacture of
__________ is acetylene and hydrochloric acid.
A. phthalic anhydride
B. vinyl chloride
C. maleic anhydride
D. dacron
B. vinyl chloride
In industrial nomenclature, alcohol means
A. butyl alcohol
B. propyl alcohol
C. ethanol
D. methyl alcohol
C. ethanol
Which of the following is the purest form of water out of the following?
A. Underground water
B. Rain water
C. Well water
D. Lake water
B. Rain water
Use of water having dissolved oxygen in boilers promotes
A. corrosion
B. sequestration
C. scale formation
D. none of these
A. corrosion
Unsaturated oils compared to saturated oils have
A. lower melting point & higher reactivity to
oxygen.
B. higher melting point & higher reactivity to oxygen.
C. lower melting point & lower reactivity to oxygen.
D. higher melting point & lower reactivity to oxygen.
A. lower melting point & higher reactivity to
oxygen.
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
A. increases
B. increases linearly
C. decreases
D. decreases linearly
C. decreases
Chemical formula of oleum is
A. H2SO3
B. H2SO4
C. H2S2O7
D. H2SO7
D. H2SO7
Electrodeposition of metals i.e. electroplating is never done on
A. metals
B. alloys
C. refractories
D. non-metals
C. refractories
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A. cutting
B. fibrillation
C. hydration
D. strengthening
D. strengthening
The biochemical treatment applied to sewage effluents is a process of
A. dehydration
B. reduction
C. oxidation
D. polymerisation
C. oxidation
A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).
A. 1
B. 10
C. 25
D. 40
B. 10
Sucrose content in cane sugar may be around
__________ percent.
A. 50
B. 70
C. 80
D. 95
D. 95
‘Hollander beater’ machine used in the paper
manufacturing plant does not accomplish the task of
A. final rolling out of paper.
B. cutting of fibres.
C. hydration of fibres.
D. fibrillation of fibre.
A. final rolling out of paper.
Yellow glycerine is made into white, using
A. activated carbon
B. diatomaceous earth
C. bauxite
D. bentonite
A. activated carbon
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is
__________ °C.
A. -5 to 0
B. 5 to 10
C. 30 to 50
D. 75 to 80
C. 30 to 50
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
A. reverse osmosis
B. sand filter
C. lime soda
D. permutit
A. reverse osmosis
Major component of flint glass is
A. lead oxide
B. silica
C. alumina
D. soda
A. lead oxide
Calcination of gypsum produces
A. plaster of paris
B. salt cake
C. nitre cake
D. lime
A. plaster of paris
Phthalic anhydride is produced by the oxidation of
A. naphthalene
B. benzene
C. toluene
D. aniline
B. benzene
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
A. flint
B. soda
C. pyrex
D. potash
C. pyrex
Zeigler process
A. produces high density polyethylene.
B. produces low density polyethylene.
C. uses no catalyst.
D. employs very high pressure.
A. produces high density polyethylene.
Massecuite is
A. used for paper making.
B. used as a cattle feed.
C. highly acidic in nature.
D. none of these.
D. none of these.
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
A. 70
B. 55
C. 80
D. 94
D. 94
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
A. hard
B. soft
C. metallic
D. lubricating
B. soft
Synthetic glycerine is produced from
A. toluene
B. phenol
C. propylene
D. naphthalene
C. propylene
A ‘unit process’ is exemplified by the
A. distillation
B. hydrogenation of oils
C. absorption
D. humidification
B. hydrogenation of oils
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is
A. a slow reaction.
B. a discontinuous reaction (requiring regeneration
of iron by water gas intermittently).
C. still in development stage (by employing fluidised
bed technique).
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Viscosity index improver (like polystrene or
polyisobutylene) is added to lubricant to
A. reduce its viscosity.
B. increase its viscosity.
C. reduce the variation in its viscosity with
temperature.
D. increase the variation in its viscosity with
temperature.
C. reduce the variation in its viscosity with
temperature.
Pick out the wrong statement pertaining to solvent
extraction of oil. Rate of extraction
A. decreases with decrease of thickness of the
flakes.
B. increases with the increasing flake size keeping
the flake thickness constant.
C. increases Considerably with the rise of
temperature.
D. decreases as the moisture content of flakes
increases.
D. decreases as the moisture content of flakes
increases.
Sea weeds are an important source of
A. fluorine
B. chlorine
C. bromine
D. iodine
D. iodine
Polythene is a/an __________ polymerisation product.
A. addition
B. condensation
C. thermosetting
D. none of these
A. addition
Catalytic oxidation-dehydrogenation of methyl alcohol
produces
A. formaldehyde
B. phenol
C. acetone
D. maleic anhydride
A. formaldehyde
Tall oil obtained as a by-product from the black liquor recovery is
A. a black, sticky & viscous liquid.
B. used in the manufacture of greases, emulsions & soaps.
C. composed mainly of rosin & fatty acids.
D. all (a), (b) & (c).
D. all (a), (b) & (c).
__________ is a polysacchride.
A. Maltose
B. Starch
C. Sucrose
D. Glucose
B. Starch
Nitrogen is an essential component of
A. mineral salts
B. carbohydrates
C. fats
D. proteins
D. proteins
Styrene is produced from ethyl benzene by the process of
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration
A. dehydrogenation
Acetone is produced by catalytic dehydrogenation of
A. phenol
B. naphthalene
C. isopropanol
D. ethyl benzene
C. isopropanol
Bromine content in sea water may be around __________
ppm.
A. 70
B. 640
C. 1875
D. 2500
A. 70
Argon is the third largest constituent of air (followed by N2
& O2). Its percentage by volume in air is
A. 0.14
B. 0.34
C. 0.94
D. 1.4
C. 0.94
Poly tetraflouro ethylene (P.T.F.E.) is known as
A. bakelite
B. teflon
C. celluloid
D. decron
B. teflon
Bakelite is
A. same as poly tetrafluoroethylene (PTFE).
B. an inorganic polymer.
C. same as thermosetting phenol-formaldehyde.
D. not a polymer
C. same as thermosetting phenol-formaldehyde.
__________ is produced by the dehydrogenation of ethyl benzene.
A. Styrene
B. Ethyl alcohol
C. Cumene
D. Phenol
A. Styrene
Which of the following is used as a coagulant in water treatment ?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide
C. Ferrous sulphate
__________ paper is used in the manufacture of
newsprint paper.
A. Groundwood
B. Board
C. Tissue
D. Wrapping
A. Groundwood
Hydrogenation of vegetable oils is a/an __________
reaction.
A. endothermic
B. autocatalytic
C. exothermic
D. homogenous
C. exothermic
Permanent hardness of water is due to the presence of calcium & magnesium
A. bi-carbonates
B. sulphates & chlorides
C. carbonate
D. none of these
B. sulphates & chlorides
Concentration of sulphide ores is done usually by
A. roasting
B. smelting
C. froth floatation
D. electro magnetic separation
C. froth floatation
Dacron is a/an
A. polyester
B. unsaturated polyster
C. polyamide
D. inorganic polymer
A. polyester
Sodium carbonate (soda ash) is not used in the
manufacture of
A. fire extinguishers
B. sugar
C. baking powder
D. detergents
D. detergents
Viscose rayon
A. cannot be made from sulphite pulp.
B. utilises H2SO4, NaOH and CS2 during its
manufacture.
C. cannot yield textile grade fibre.
D. none of these.
B. utilises H2SO4, NaOH and CS2 during its
manufacture.
Nylon 6-6 is manufactured from
A. hexamethylene diamine and adipic acid.
B. hexamethylene diamine and maleic anhydride.
C. caprolactum.
D. dimethyl terephthalate and ethylene glycol
A. hexamethylene diamine and adipic acid.
Chemical name of Grignard reagent is
A. sodium thiosulphate.
B. ethyl magnesium chloride.
C. sodium sulphite.
D. sodium bicarbonate
B. ethyl magnesium chloride.
Which of the following processes is absent in glass
manufacturing process ?
A. Sintering
B. Annealing
C. Shaping or forming
D. Melting
A. Sintering
Production of one ton of dry paper pulp requires about
__________ tons of bamboo or wood.
A. 1
B. 2.5
C. 5
D. 10
B. 2.5
Dacron (or terylene) fibres as compared to nylon’fibres
have
A. better heat & acid resistant properties.
B. poorer resistance to alkalis.
C. poorer dyeability.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
The function of gypsum addition during cement making is to
A. increase the density of cement.
B. decrease the cement setting rate.
C. both (a) and (b).
D. neither (a) nor (b).
B. decrease the cement setting rate.
Low purity oxygen is used for
A. L.D. steel making.
B. cutting and welding of metals.
C. medicinal purposes.
D. chemical oxidation processes.
D. chemical oxidation processes.
__________ is produced using molasses as the starting raw material.
A. Methyl alcohol
B. Ethyl alcohol
C. Benzol
D. Dimethyl ether
B. Ethyl alcohol
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
A. high electrical insulation properties.
B. sharp melting points.
C. low co-efficient of thermal expansion.
D. compressive strength much greater than their
tensile strengths.
B. sharp melting points.
A substance produced by a living organism and capable of anti-microbial activity is called a/an
A. antibiotic
B. antiseptic
C. disinfectant
D. none of these
A. antibiotic
Deaeration of water in its treatment is necessary, as it
A. minimises its turbidity.
B. helps in controlling its taste and odour.
C. minimises its corrosiveness.
D. none of these.
C. minimises its corrosiveness.
Hydrochloric acid is also known as
A. oil of vitriol
B. muriatic acid
C. strong organic acid
D. green acid
B. muriatic acid
Aryl benzene sulphonate (ABS) is a
A. detergent.
B. plasticiser for unsaturated polyester.
C. starting material for the synthesis of glycerine.
D. coating ingredient for photographic film.
A. detergent.
Adipic acid is an intermediate in the manufacture of
A. perspex
B. nylon-66
C. polystyrene
D. bakelite
B. nylon-66
Soaps remove dirt by
A. increasing the surface tension.
B. decreasing wettability.
C. supplying hydrophyllic group.
D. none of these.
D. none of these.
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
A. Xanthates
B. Stearic acid
C. Calcium & aluminium stearate
D. Formic acid
C. Calcium & aluminium stearate
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
A. Bauxite
B. Limestone
C. Quartz
D. Manganese
B. Limestone
Gun powder uses
A. sulphur
B. charcoal
C. potassium nitrate
D. all (a), (b), & (c)
D. all (a), (b), & (c)
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
A. tetrachloroethane
B. trichloroethane
C. tetrachloromethane
D. trichloromethane
B. trichloroethane
The basic difference between vegetable oils and fats is in their
A. density
B. chemical properties
C. physical state
D. composition
C. physical state
Which of the following is not a food additive?
A. Citric acid
B. Invertage
C. Benzoyl peroxide
D. Ammonium chloride
D. Ammonium chloride
Alum is commercially produced from
A. gypsum
B. feldspar
C. galena
D. bauxite
D. bauxite
Starting raw material for the manufacture of maleic anhydride is
A. n-butene
B. benzene
C. either (a) or (b)
D. neither (a) nor (b)
C. either (a) or (b)
Pick out the wrong statement.
A. Fibrillation of fibre during paper manufacture is
done to develop the strength in paper.
B. Alkali consumption in digestion/cooking of
bamboo is measured in terms of permangnate
number.
C. Bagasse fibre contains both lignin & cellulose.
D. Presence of sodium sulphate in pulp makes
the pulp bleachability poor.
D. Presence of sodium sulphate in pulp makes
the pulp bleachability poor.
Which of the following contains least amount of N2 ?
A. Coke oven gas
B. Blast furnace gas
C. Producer gas
D. Water gas (blue gas).
A. Coke oven gas
Calcination of limestone is not done in a __________ kiln for producing lime.
A. vertical shaft
B. rotary
C. fluidised bed
D. fixed bed
D. fixed bed
Neoprene is a
A. monomer
B. synthetic rubber
C. polyester
D. none of these
B. synthetic rubber
Saponification value/number of an oil or fat is a measure of its
A. fatty acid content.
B. degree of unsaturation of the fatty acids present in it.
C. average molecular weight.
D. insoluble fatty acid content.
C. average molecular weight.
Ethyl alcohol cannot be produced
A. from waste sulphite substrate of paper mills.
B. by esterification and hydroloysis of ethylene.
C. from molasses.
D. none of these
D. none of these
Cement mainly contains
A. CaO, SiO2, Al2O3
B. MgO, SiO2, K2O
C. Al2O3, MgO, Fe2O3
D. CaO, MgO, K2O
A. CaO, SiO2, Al2O3
Sand and __________ is fused at 1300°C, to produce
sodium silicate.
A. limestone
B. soda ash
C. coke
D. sodium sulphate
B. soda ash
Coke used for the production of calcium carbide should have
A. low ash content.
B. low ignition temperature.
C. high electrical resistivity.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Sucrose is a disaccharide consisting of
A. glucose and glucose
B. glucose and fructose
C. glucose and galactose
D. fructose and galactose
B. glucose and fructose
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
A. brighten the faint images.
B. remove metallic silver.
C. convert silver chloride to silver.
D. remove unexposed silver halide.
D. remove unexposed silver halide.
_________ is not a constituent of gun powder.
A. Carbon
B. Charcoal
C. Sulphur
D. Potassium nitrate
A. Carbon
Hydrophilic group of a soap or detergent solution is
A. water hating
B. soil loving
C. water loving
D. none of these
C. water loving
Rotary kiln is not involved in the production of
A. cement
B. lime from limestone
C. slaked lime from quick lime
D. none of these
C. slaked lime from quick lime
Vanillin is a type of
A. anti-pyretic drug
B. food preservative
C. flavour
D. dye
C. flavour
Temporary hardness of water can be removed by
A. addition of alum (a coagulant).
B. boiling.
C. filtration (through gravity sand filter).
D. addition of lime
B. boiling.
More than 100 percent of __________ is present in
oleum.
A. SO3
B. H2SO4
C. H2SO3
D. SO2
B. H2SO4
Pure rectified spirit contains about __________ percent
alcohol.
A. 45
B. 70
C. 95
D. 99.5
C. 95
Titanium dioxide is a/an __________ colour pigment.
A. white
B. black
C. yellow
D. blue
A. white
Mercury cells for caustic soda manufacture, compared to diaphragm cells
A. require lower initial investment.
B. require more power.
C. produce lower concentration NaOH.
D. none of these.
D. none of these.
Cellulose percentage in bamboo fibre is about
A. 10
B. 20
C. 50
D. 85
C. 50
Essential oils are usually obtained using
A. steam distillation
B. extractive distillation
C. solvent extraction
D. leaching
A. steam distillation
Impurities present in brine is normally removed by
treatment with
A. NH3 and CO2.
B. lime and soda ash.
C. lime, ammonia and carbon.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Hydrogenation of oil/fat does not
A. improve its resistance to rancid oxidation.
B. raise its melting point.
C. remove double bonds.
D. none of these
D. none of these
Solvay process as compared to dual process (i.e.
modified Solvay process)
A. can use low grade brine.
B. has less corrosion problems.
C. involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl.
D. both (b) and (c).
D. both (b) and (c).
Builders are added in soap to act as
A. cleaning power booster
B. anti-redeposition agent
C. corrosion inhibitor
D. fabric brightener
A. cleaning power booster
H2S is scrubbed from refinery gases by absorption using
A. dilute H2SO4
B. ethanol amine
C. chilled water
D. tri-butyl phosphate
B. ethanol amine
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
A. Oxidation of Na+ ions
B. Oxidation of Cl- ions
C. Reduction of Na+ ions
D. Reduction of Cl- ions
B. Oxidation of Cl- ions
Zeolite is a/an
A. naturally occuring clay which is capable of
exchanging cations.
B. abrasive material.
C. catalyst used in shift conversion.
D. none of these.
A. naturally occuring clay which is capable of
exchanging cations.
Type of glass used in optical work is the __________
glass.
A. soda-lime
B. fibre
C. lead
D. borosilicate
C. lead
Pick out the wrong statement pertaining to the soap manufacture.
A. Transparent soaps are made by cold process.
B. Organic pigments are used as colouring materials
in the soap manufacture.
C. Both laundary as well as toilet soaps are
manufactured by hot process.
D. Colourless rosin is used in the manufacture of
laundary soaps.
A. Transparent soaps are made by cold process.
Ceramics are produced from silicates or clayish materials:
Which of the following is not a ceramic material ?
A. Slag cement
B. Glasses
C. Porcelain/Potteries
D. Teflon
D. Teflon
Glass is
A. mainly CaO
B. subjected to galvanising
C. a super cooled liquid
D. all (a), (b) and (c)
C. a super cooled liquid
Analgesic drugs are
A. pain relievers
B. antibiotics
C. used in the treatment of T.B.
D. used in the treatment of typhoid
A. pain relievers
Commonly used glass is known as the __________ glass.
A. flint
B. hard
C. pyrex
D. soda
D. soda
Fusion of limestone and __________ produces high
alumina cement.
A. sand
B. bauxite
C. quicklime
D. calcite
B. bauxite
Massecuite is a terminology used in the __________
industry.
A. paint
B. oil hydrogenation
C. soap
D. sugar
D. sugar
The basic constituent of vegetable oils is
A. triglyceride
B. fatty acids
C. fatty alcohol
D. mono esters
A. triglyceride
The most economical pulp for the production of newsprint would be the __________ pulp.
A. groundwood
B. sulphate
C. sulphite
D. semichemical
A. groundwood
Which of the following is the second major component of
cement ?
A. Al2O3
B. SiO2
C. CaO
D. Fe2O3
B. SiO2
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates
B. Chromates
L.D. converter is used in the production of
A. pig iron
B. steel
C. copper
D. zinc
B. steel
The terminology ‘BTX’ used in coal tar distillation industry refers to
A. benzol-toluol-xylol.
B. benzol-toluene-xylene.
C. benzene-toluol-xylol.
D. benzene-toluene-xylene.
D. benzene-toluene-xylene.
Which of the following is not responsible for causing permanent hardness of water ?
A. Ca(HCO3)2
B. CaCl2
C. MgCl2
D. none of these
A. Ca(HCO3)2
In the Solvay process, the product from the calciner is
A. light soda ash
B. dense soda ash
C. sodium bicarbonate
D. dehydrated soda ash
A. light soda ash
Commercially ethylene is produced from naphtha by
A. catalytic cracking.
B. catalytic dehydrogenation
C. pyrolysis.
D. hydrocracking
D. hydrocracking
Poly Vinyl Chloride (P.V.C.) is a __________ material.
A. thermosetting
B. thermoplastic
C. fibrous
D. chemically active
B. thermoplastic
Pig iron is produced by blast furnaces using mostly the iron ore named
A. hematite
B. magnetite
C. siderite
D. chalcopyrite
A. hematite
The difference between saponification value and acid value is
A. called ester value.
B. always negative.
C. constant for all fatty oils.
D. none of these.
A. called ester value.
Fourdrinier machine is used in the manufacture of
A. nylon-6
B. paper
C. antibiotics
D. sugar
B. paper
Penicillin is made employing __________ fermentation process.
A. continuous
B. aerobic batch
C. anaerobic batch
D. none of these
B. aerobic batch
Sulphuric acid saturated with SO3 is called
A. concentrated H2SO4.
B. sulphurous acid.
C. oleum
D. none of these.
C. oleum
Nylon 66 is so named because the
A. average degree of polymerisation of the
polymer is 1966.
B. number of carbon atoms between two nitrogen
atoms are 6.
C. number of nitrogen atoms between two carbon
atoms are 6
D. polymer was first synthesised in 1966
A. average degree of polymerisation of the
polymer is 1966.
Wet chlorine gas produced during electrolysis of brine is dehydrated by
A. spraying 66° Be H2SO4 counter current to the
flow of the gas.
B. passing it through a bed of diatomaceous earth.
C. passing it through a bed of silica gel.
D. none of these.
A. spraying 66° Be H2SO4 counter current to the
flow of the gas.
_________ of quicklime produces slaked lime.
A. Hydration
B. Dehydration
C. Hydrogenation
D. none of these
A. Hydration
Main product in calcium carbide-water reaction is
A. Ca(OH)2
B. C2H2
C. CO2
D. CaCO3
B. C2H2
Which of the following fuel gases contains maximum amount of carbon monoxide ?
A. Coke oven gas
B. Water gas
C. Blast furnace gas
D. L.D. converter gas
D. L.D. converter gas
Baking soda is chemically represented by
A. Na2CO3
B. NaHCO3
C. Na2CO3.H2O
D. Na2CO3.10H2O
B. NaHCO3
Which of the following is an additional step in the
manufacture of paper from bagasse as compared to that from bamboo ?
A. Depithing
B. Digestion
C. Bleaching
D. None of these
A. Depithing
Percentage of glycerene present in the spent lye obtained during soap manufacture is about
A. 0.5
B. 5
C. 20
D. 35
B. 5
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
C. 50
Commercial production of Vanaspati is done by
__________ of edible vegetable oils.
A. hydrogenation
B. oxidation
C. hydrolysis
D. hydrocracking
A. hydrogenation
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
A. AgO
B. Al2O3
C. ZnCl2
D. Fe2O3
A. AgO
Phenolic antiseptics are added in the __________ soap.
A. shaving
B. medicated
C. metallic
D. transparent
B. medicated
Solvay process is used for the manufacture of
A. caustic soda
B. soda ash
C. caustic potash
D. soda lime
B. soda ash
A mixture of chlorine & sodium bromide acts as a/an
A. insecticides
B. analgesic drug
C. fire retardant
D. hydrogenation catalyst
C. fire retardant
Which is a high grade pulp ?
A. Rag pulp
B. Mechanical pulp
C. Sulphate pulp
D. Sulphite pulp
C. Sulphate pulp
Stereospecific agents are exemplified by
A. radiation
B. supported metal oxide catalysts
C. ziegler catalysts
D. all (a), (b) & (c)
D. all (a), (b) & (c)
Starting material for the production of butadiene is
A. naphthalene
B. benzol
C. ethyl alcohol
D. phthalic anhydride
C. ethyl alcohol
Yellow phosphorus is transported under
A. air
B. water
C. nitrogen
D. helium
B. water
Permanent hardness of water can be removed by
A. simply boiling.
B. adding alum.
C. passing it through cation & anion exchangers.
D. all (a), (b) and (c).
C. passing it through cation & anion exchangers.
Celluloid is chemically
A. cellulose acetate
B. regenerated cellulose
C. cellulose nitrate
D. cellulose acetate butyrate
C. cellulose nitrate
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
A. nitric acid
B. sulphuric acid
C. ammonium sulphate
D. hydrochloric acid
B. sulphuric acid
Which of the following is an explosive ?
A. Nitroglycerene
B. Trintrotoluene (TNT)
C. Cellulose nitrate
D. All (a), (b), and (c)
D. All (a), (b), and (c)
Zeolite is used in the
A. water treatment.
B. glass manufacture.
C. hydrogenation of fatty oil as a catalyst.
D. development of exposed photographic plate.
A. water treatment.
Thermoplastic materials
A. do not soften on application of heat.
B. are heavily branched molecules.
C. are solvent insoluble.
D. none of these.
D. none of these.
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of
A. trichloroethylene
B. perchloroethylene
C. parathion
D. methanol
B. perchloroethylene
Salt is added in the kettle during soap manufacture to separate
A. soap from lye.
B. glycerine from lye.
C. the metallic soap.
D. the unsaponified fat from soap.
A. soap from lye.
Manufacture of phthalic anhydride uses __________ as a catalyst.
A. Ni
B. Cr
C. V2O5
D. Al2O3
C. V2O5
Which of the following is not a product of coal tar
distillation?
A. Anthracene
B. Cresote oil
C. Carbolic oil
D. None of these
D. None of these
Chrome tanning and vegetable tanning are done for
A. light & heavy leather respectively.
B. heavy & light leather respectively.
C. both light & heavy leather.
D. neither light nor heavy leather.
A. light & heavy leather respectively.
Catalyst used during the manufacture of ‘Vanaspati Ghee’ is
A. zinc
B. nickel
C. platinum
D. copper
B. nickel
Iron ore hametite is concentrated using
A. electro magnetic separation mainly.
B. gravity separation.
C. froth floatation.
D. roasting
B. gravity separation.
Refractory bricks burnt at very high temperature have got
A. greater resistance to corrosion by slags.
B. less resistance to corrosion by slags.
C. high spalling tendency.
D. none of these.
A. greater resistance to corrosion by slags.
Nitrile rubber is produced by the polymerisation of
A. acrylonitrile and butadiene.
B. acrylonitrile and styrene.
C. isobutylene and isoprene.
D. none of these.
A. acrylonitrile and butadiene.
Carbon disulphide is mainly used in the production of
A. viscose rayon.
B. corundum.
C. plasticiser for unsaturated polyester.
D. paints
A. viscose rayon.
99.5% purity oxygen is used in
A. cutting and welding by oxy-acetylene flame.
B. hospitals for medicinal purposes.
C. gas masks and artificial breathing apparatus.
D. all (a), (b), and (c).
D. all (a), (b), and (c).
Nylon-6 is manufactured from
A. caprolactum.
B. hexamethylene diamine and adipic acid.
C. hexamethylene diamine and maleic anhydride.
D. hexamethylene diamine and sebacic acid.
A. caprolactum.
Sizing material is incorporated in paper to
A. impart resistance to penetration by liquids.
B. increase its thickness.
C. increase its flexibility & opacity.
D. increase its brightness.
A. impart resistance to penetration by liquids.
Pick out the wrong statement.
A. Pasteurisation of milk involves moderate heating
followed by cooling.
B. Bakeries and breweries make use of yeasts.
C. Enzyme is a complex nitrogenous compound.
D. Oils and fats are alkaloids.
D. Oils and fats are alkaloids.
Which of the following, when pyrolysed, produces
perchloro-ethylene ?
A. Ethylene dichloride
B. Chlorobenzene
C. Carbon tetrachloride
D. Chlorinated paraffin
C. Carbon tetrachloride
Chemical name of aspirin (an analgesic drug) is
A. acetylsalicylic acid
B. nictonic acid
C. calcium acetate
D. methyl salicylate
A. acetylsalicylic acid
Which is the most efficient absorbant for SO3 out of the following ?
A. 20% oleum
B. 65% oleum
C. 78%H2SO4
D. 98%H2SO4
D. 98%H2SO4
Coal tar is used as a
A. binding material for coal briquettes.
B. fuel in rotary kiln.
C. binder in making carbon electrodes.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Caprolactum (a raw material for nylon-6 manufacture) is produced from
A. phenol
B. naphthalene
C. benzene
D. pyridine
C. benzene
The purpose of adding Na2CO3 to water of low alkalinity is to
A. permit the use of alum as a coagulant.
B. increase the softening capacity of zeolite.
C. facilitate easy regeneration of zeolite.
D. all (a), (b) and (c).
A. permit the use of alum as a coagulant.
Ca(OH)2 is called
A. quicklime
B. slaked lime
C. limestone
D. gypsum
B. slaked lime
Potassium is kept & transported under
A. water
B. liquid ammonia
C. kerosene oil
D. alcohol
C. kerosene oil
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
A. electrolysis
B. electrolytic reduction
C. electrolytic oxidation
D. none of these
B. electrolytic reduction
Bakelite is chemically known as
A. polyvinyl chloride (PVC)
B. polybutadiene
C. phenol formaldehyde
D. polyurathane
C. phenol formaldehyde
Which of the following is a co-product during the
manufacture of caustic soda by electrolysis of brine ?
A. Na2CO3
B. NaHCO3
C. H2
D. none of these
C. H2
Phthalic anhydride is made by the
A. oxidation of naphthalene.
B. oxidation of benzene.
C. dehydrogenation of ethyl benzene.
D. none of these.
A. oxidation of naphthalene.
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
A. cyclo trimethylene trinitramine.
B. trinitro resorcinol.
C. cyclo tetramethylene tetranitramine.
D. trinitro benzene.
A. cyclo trimethylene trinitramine.
Raw material used in alcohol distilleries is
A. molasses
B. benzol
C. methylated spirit
D. none of these
A. molasses
Oil produced by solvent extraction
A. has low free fatty acid content.
B. is odourless.
C. both (a) &(b).
D. neither (a) nor (b).
D. neither (a) nor (b).
High acid value of an oil or fat is an indication of
A. storage under improper conditions.
B. absence of unsaturation.
C. its smaller molecular weight.
D. none of these
A. storage under improper conditions.
Yeast is used in the manufacture of
A. penicillin
B. antibiotics
C. wine
D. pasteurised milk
C. wine
Liquefaction of gases can not be done by
A. exchange of heat with colder stream.
B. adiabatic expansion through a throttle valve
(Joule-Thomson expansion).
C. merely compressing it beyond critical
pressure.
D. adiabatic expansion against a piston or in a
turbine.
C. merely compressing it beyond critical
pressure.
Anion exchanger is regenerated usually with
A. NaOH
B. H2SO4
C. hydrazine
D. alum solution
A. NaOH
__________ is the major constituent of the Portland
cement.
A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate
C. Tricalcium silicate
Parathion and Malathion are
A. pesticides.
B. plasticisers for unsaturated polysters.
C. pain-relieving drugs (analgesic).
D. tranquilisers.
A. pesticides.
Catalytic oxidation of naphthalene produces
A. styrene
B. phenol
C. phthalic anhydride
D. none of these
C. phthalic anhydride
Transparent soaps (e.g. Pears) are
A. usually soft soap (made from coconut oil) in
which cane sugar & alcohol are added and
finally washed with methylated spirit to
achieve transparency.
B. metallic soaps with frothing agent and free stearic
acid to achieve transparency.
C. metallic soaps with frothing agent from which
glycerine has not been recovered.
D. none of these.
A. usually soft soap (made from coconut oil) in
which cane sugar & alcohol are added and
finally washed with methylated spirit to
achieve transparency.
Dehydrogenation of ethyl benzene produces
A. styrene
B. naphthalene
C. phenol
D. benzoic acid
A. styrene
Reaction of ethylene glycol and dimethyl terephthalate
(DMT) produces
A. nylon-6
B. dacron
C. polyester
D. PVC
B. dacron
Lindane is
A. not a fumigant.
B. BHC (Benzene Hexa Chloride) containing 99%
γ-isomer.
C. a by-product of BHC manufacture.
D. both(b) and (c).
B. BHC (Benzene Hexa Chloride) containing 99%
γ-isomer.
Solvay process is not used for the manufacture of
potassium carbonate, because of the reason that
potassium bicarbonate
A. is prone to thermal decomposition.
B. has high water solubility and is unstable.
C. is soluble in ammonium chloride and
potassium chloride solution.
D. all (a), (b) and (c)
C. is soluble in ammonium chloride and
potassium chloride solution.
Which of the following is a bleaching agent added in the
detergents to facilitate removal of stains caused due to
blood, tea etc?
A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda
B. Sodium borate
In the production of soda ash by Solvay process, the by-product is
A. CaCl2
B. NH4Cl
C. NH3
D. NaOH
A. CaCl2
The ideal pulp for the manufacture of paper should have high __________ content.
A. cellulose
B. lignin
C. both (a) & (b)
D. none of these
A. cellulose
At very high concentration of enzymes, the rate of
fermentation chemical reaction is __________ the
concentration of reactants.
A. independent of
B. directly proportional to
C. inversely proportional to
D. proportional to the square of
A. independent of
Which of the following is a constituent of vinegar ?
A. Around 10% alcohol
B. Around 1% acetic acid
C. Both (a) and (b)
D. Neither (a) nor (b)
C. Both (a) and (b)
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
A. it is very corrosive at elevated temperature.
B. its viscosity is not reduced on further heating
(hence pressure drop on pumping it, cannot
be further reduced).
C. it decomposes on further increasing the
temperature.
D. none of these.
B. its viscosity is not reduced on further heating
(hence pressure drop on pumping it, cannot
be further reduced).
Kopper-Totzek coal gasifier
A. can give ammonia synthesis gas (H2 + N2).
B. is a moving bed reactor.
C. cannot use coking coal.
D. operate at very high pressure.
A. can give ammonia synthesis gas (H2 + N2).
Addition of calcium oxide to water produces
A. exothermic heat
B. hissing sound
C. slaked lime
D. all (a), (b) & (c)
D. all (a), (b) & (c)
Sodium bisulphite is used for __________ water.
A. deaeration
B. dechlorination
C. both (a) & (b)
D. neither (a) nor(b)
C. both (a) & (b)
Riboflavin is a/an
A. vitamin
B. analgesic drug
C. anaesthetics
D. anti-malarial drug
A. vitamin
Flash point of most vegetable oils is about __________ °C.
A. 50
B. 100
C. 200
D. 300
C. 200
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
A. facilitates its use even in hard water (by
sequestering the water-hardening Ca & Mg
ions).
B. inhibits its corrosive effects.
C. does not allow redeposition of dirt on the cleaned
surface.
D. none of these.
A. facilitates its use even in hard water (by
sequestering the water-hardening Ca & Mg
ions).
Hydrazine is largely used
A. as a starting material for ‘hypo’.
B. in photographic industry.
C. as rocket fuel.
D. in printing industry.
C. as rocket fuel.
Reverse osmosis is normally used for the
A. separation of isotopes of uranium from gaseous uranium hexaflouride.
B. separation of helium from natural gas.
C. desalination of brackish water to produce
potable (drinking) water.
D. purification of oxygen.
C. desalination of brackish water to produce
potable (drinking) water.
Dense soda ash used in the manufacture of glass, is chemically represented by
A. Na2CO3
B. Na2CO3.10H2O
C. Na2CO3.H2O
D. Na2HCO3
C. Na2CO3.H2O
‘Synthesis gas’ meant for the synthesis of organic
compound is a variable mixture of
A. N2 & H2
B. CO2 & H2
C. CO & H2
D. C & H2
C. CO & H2
Litharge is
A. lead oxide
B. zinc oxide
C. zinc sulphide
D. cellulosic photographic material
A. lead oxide
Coagulant is used __________ filtration
A. before
B. after
C. during
D. to avoid
A. before
10% oleum comprises of 10% free
A. SO2
B. H2SO3
C. SO3
D. H2SO4
C. SO3
Use of chlorine in the treatment of sewage
A. helps in grease separation.
B. increases the biological oxygen demand(BOD).
C. causes bulking of activated sludge.
D. aids in flocculation.
A. helps in grease separation
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
A. emulsification
B. dispersion
C. precipitation
D. wetting
C. precipitation
Margarine is a/an
A. fat
B. explosive
C. plasticiser
D. rocket propellant
A. fat
Oils and fats are converted to soap in a process called
A. hydrogenation
B. esterification
C. saponification
C. saponification
C. saponification
Thorium is mainly used
A. for the manufacture of gas mantles.
B. as a fissile fuel in a nuclear reactor.
C. in the manufacture of hydrogen bomb.
D. in the treatment of cancer.
A. for the manufacture of gas mantles.
During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to
A. increase the rate of absorption.
B. avoid corrosion.
C. reduce the cooling water circulation rate.
D. none of these
B. avoid corrosion.
Good quality of edible salt is obtained from brine by the process of
A. solar evaporation
B. vacuum evaporation
C. freeze drying
D. electrolysis
B. vacuum evaporation
Which of the following is used as a binding material in soap to improve soap texture ?
A. Rosin
B. Borax
C. Benzyl acetate
D. Sodium carbonate
B. Borax
Electric bulbs are made of __________ glass.
A. jena
B. flint
C. crookes
D. pyrex
B. flint
An alkali metal salt of palmitic acid is known as
A. soap
B. metallic soap
C. detergent
D. alkaloid
B. metallic soap
Washing soda is chemically represented by
A. Na2CO3
B. Na2CO3.H2O
C. Na2CO3.10H2O
D. NaHCO3
C. Na2CO3.10H2O
Magnesium and calcium __________ cause temporary hardness of water.
A. carbonates
B. bicarbonates
C. phosphates
D. sulphates
B. bicarbonates
Which form of sulphur is the most stable at room temperature ?
A. Plastic
B. Monoclinic
C. Rhombic
D. Flowers of Sulphur
C. Rhombic
Vegetable oils and fats basically differ in their
A. density ranges
B. physical state
C. chemical composition
D. chemical properties
B. physical state
Oil is a/an
A. mixture of glycerides.
B. mixture of glycerides of fatty acids.
C. solid at normal temperature.
D. ester of alcohols other than glycerine.
B. mixture of glycerides of fatty acids.
Which of the following is the main constituent of the mother liquor produced in salt industry ?
A. Quick lime
B. Glauber’s salt
C. Salt petre
D. Bromine
D. Bromine
Which of the following is a constituent of coffee ?
A. Caffeine
B. Nicotine
C. Calgon
D. Lignin
A. Caffeine
Silicon carbide is a/an
A. adhesive
B. abrasive
C. type of glass
D. brittle material
B. abrasive
Oxygen is produced by fractionation of air using __________ process.
A. Linde’s
B. Claude’s
C. either (a) or (b)
D. none of these
C. either (a) or (b)
Trinitrotoluene (TNT), an explosive, is made by the nitration of
A. nitrobenzene
B. toluene
C. nitrotoluene
D. benzene
B. toluene
Which of the following is used as a coagulant in treating turbid water ?
A. Chlorine
B. Ferric sulphate
C. Calcium sulphate
D. Activated carbon
B. Ferric sulphate
Carborundum consists mainly of
A. bauxite
B. silicon carbide
C. boron carbide
D. calcium carbide
B. silicon carbide
Wax is a
A. mixture of glycerides.
B. mixture of esters of polyhydric alcohols excepting glycerine.
C. liquid at room temperature.
D. mixture of glycerides of fatty acids.
B. mixture of esters of polyhydric alcohols excepting glycerine.
Catalyst used in the hydrogenation of oil is
A. nickel
B. platinum
C. iron
D. alumina
A. nickel
Triple superphosphate is manufactured by reacting
A. phosphate rock with phosphoric acid.
B. phosphate rock with sulphuric acid.
C. phosphate rock with nitric acid.
D. ammonium phosphate with phosphoric acid.
A. phosphate rock with phosphoric acid.
Viscose rayon is
A. cellulose nitrate.
B. regenerated cellulose nitrate.
C. regenerated cellulose acetate.
D. none of these.
D. none of these.
Use of hydrated lime in water treatment
A. before filtration, reduces the bacterial load on filters.
B. after filtration, combats the corrosive-ness of water due to the presence of O2 & CO2.
C. is to adjust the pH value.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Higher vicosity index of a lubricating oil denotes
A. less changes in fluidity of oil with
temperature.
B. substantially high change in fluidity of oil with temperature.
C. its unsuitability under varying temperature conditions .
D. none of these
A. less changes in fluidity of oil with
temperature.
Le-Blanc process is a primitive process for the manufacture of
A. caustic soda
B. soda ash
C. bromine from sea water
D. hydrochloric acid
B. soda ash
Cement setting under water employs a/an __________
process.
A. hydration
B. decomposition
C. oxidation
D. reduction
A. hydration
__________ are added in lacquers to remove film brittleness and to improve adhereness.
A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents
B. Plasticisers
Washing of coal is done to
A. remove the inherent impurities.
B. remove the adhering impurities.
C. reduce the ash content.
D. both(b) and (c).
D. both(b) and (c).
Systemic insecticides
A. are absorbed throughout the plant.
B. kill insects following external bodily contact.
C. are stomach poisons.
D. emit poisonous vapour.
A. are absorbed throughout the plant.
Dry ice (solidified CO2) is used for the
A. storage & shipment of frozen foods and ice-creams.
B. liquefaction of permanent gases.
C. liquefaction of natural gas.
D. none of these.
A. storage & shipment of frozen foods and ice-creams.
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
A. substrate
B. enzyme
C. nutrient
D. none of these
B. enzyme
Pick out the wrong statement.
A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction.
B. Chloral is obtained by the chlorination of ethyl alcohol.
C. Insecticides acting on the insects through the respiratory system are called fumigants.
D. Benzene hexachloride is not a contact insecticide.
D. Benzene hexachloride is not a contact insecticide.
The product obtained on mixing calcium oxide with water is called
A. quicklime
B. slaked lime
C. milk of lime
D. none of these
B. slaked lime
The major constituent of black liquor generated during paper manufacture is sodium
A. sulphate
B. carbonate
C. hydroxide
D. bi-carbonate
B. carbonate
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
A. explosive
B. soap
C. detergent
D. analgesic drug
C. detergent
Conversion of SO2 to SO3 in Monsanto 4-pass converter
is about __________ percent.
A. 80
B. 90
C. 98
D. 100
C. 98
Lithopaneis
A. explosive
B. white lead
C. filter aid
D. ZnS (white pigment)
D. ZnS (white pigment)
Coke oven gas consists mainly of
A. H2, & CH4
B. CO, & CO2
C. H2, & CO
D. CH4, & CO
A. H2, & CH4
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?
A. Cl2 & Na
B. Cl2 & H2
C. O2 & H2
D. Cl2, H2 & NaOH solution.
D. Cl2, H2 & NaOH solution.
__________ acid is the main constituent of cotton seed oil.
A. Acetic
B. Linoleic
C. Palmitic
D. Oleic
B. Linoleic
Chemical formula of ‘salt cake’ is
A. Na2SO4
B. CaSO4
C. MgSO4
D. BaSO4
A. Na2SO4
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in
A. pyrolysis of oil.
B. sintering of porous catalyst.
C. hydrogen embrittlement.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Nicotine is
A. a volatile alkaloid.
B. obtained by treating by-products of the tobacco processing industry.
C. both (a) and (b).
D. neither (a) nor (b).
C. both (a) and (b).
Separation of fresh water from sea water can be done by the __________ operation.
A. osmosis
B. reverse osmosis
C. absorption
D. adsorption
B. reverse osmosis
Na2CO3.10H2O is called
A. washing soda
B. soda ash
C. slaked lime
D. quicklime
A. washing soda
Reaction of an alcohol with organic acid is called the __________ reaction.
A. saponification
B. esterification
C. neutralisation
D. acidification
B. esterification
Ethanol amine is produced using ammonia and
A. ethyl benzene
B. ethylene oxide
C. ethanol
D. ethane
B. ethylene oxide
__________ acid is an unsaturated fatty acid.
A. Palmitic
B. Oleic
C. Stearic
D. Oxalic
B. Oleic
__________ is a thermosetting plastic.
A. Polyvinyl chloride
B. Polythene
C. Bakelite
D. Teflon
C. Bakelite
Flux addition during smelting of ore is done to
A. remove impurities/gangue.
B. enhance rate of reaction.
C. accelerate reduction of ore.
D. separate slag from metal.
A. remove impurities/gangue.
Hydrazine is used in water treatment for the removal of
A. colloidal impurities
B. dissolved oxygen
C. turbidity
D. chlorinous taste
B. dissolved oxygen
Direct conversion of chemical energy into electrical energy is done in a
A. magnetohydrodynamic (MHD) generator.
B. fuel cell.
C. fast breeder reactor.
D. none of these.
B. fuel cell.
Which of the following is not produced commercially from sea water ?
A. Magnesium & potassium compounds
B. Common salt
C. Bromine
D. Iodine
D. Iodine
Pick out the wrong statement.
A. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag.
B. Portland cement is made employing wet process.
C. Gypsum is added to portland cement to lengthen its setting time.
D. none of these.
D. none of these.
Nylon-6 as compared to Nylon-66 is having higher
A. hardness
B. abrasion/resistance
C. melting point
D. none of these
D. none of these
Digestion of wood-base materials (for manufacture of pulp) is done to
A. remove lignin.
B. produce long fibres.
C. prevent deterioration on storage.
D. none of these
A. remove lignin.
Soap cannot be used with hard water, because
A. hard water contains sulphate.
B. they form insoluble calcium soaps which precipitate
C. they attract back the removed dirt.
D. none of these.
B. they form insoluble calcium soaps which precipitate
Which of the following is not an antibiotic ?
A. Penicillin
B. Streptomycin
C. Tetracyclin
D. Quinine
D. Quinine
The most reactive allotropic form of phosphorus is __________ phosphorus.
A. red
B. yellow
C. violet
D. black
B. yellow
Plasticisers are added to synthetic plastics to
A. impart flexibility.
B. improve workability during fabrication.
C. develop new improved properties not present in the original resins.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Rosin soap is added during paper manufacture to
A. impart adhesive properties.
B. improve opacity.
C. impart resistance to penetration by liquids.
D. none of these.
C. impart resistance to penetration by liquids.
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by
A. iron-steam reaction.
B. electrolysis of water.
C. steam reforming of naphtha.
D. its cryogenic separation from coke oven gas
A. iron-steam reaction.
Carboxymethyl cellulose (CMC) is added in detergents to
A. prevent redeposition of soil on cleaned surface.
B. act as optical brightening agent.
C. inhibit corrosion in washing machines made of aluminium,
D. none of these.
A. prevent redeposition of soil on cleaned surface.
Synthesis gas is a mixture of
A. CO and H2
B. N2 and H2
C. H2, CH4 and CO
D. CO2 and H2
A. CO and H2
Which of the following impurities in feed water for high pressure boiler is the most detrimental?
A. Silica
B. Dissolved oxygen
C. Suspended salt
D. Dissolved salt
A. Silica
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
A. cationic
B. anionic
C. amphoteric
D. semi polar
B. anionic
Reaction of calcium carbide with water produces a gas,
which is used
A. as an illuminant.
B. for metal cutting/welding.
C. both (a) & (b).
D. neither (a) nor (b).
C. both (a) & (b).
Salt is the basic raw material for the manufacture of
A. cement
B. glass
C. potteries
D. caustic soda
D. caustic soda
Presence of H2S in raw water (to be chlorinated) results in the
A. reduced softening capacity of zeolite.
B. increased dosage of chlorine to provide a disinfecting residual in the water.
C. easy removal of its hardness.
D. none of these.
B. increased dosage of chlorine to provide a disinfecting residual in the water.
Contact process of sulphuric acid manufacture
A. yields acid of higher concentration than chamber process.
B. yields acids of lower concentration than chamber process.
C. is obsolete.
D. eliminates absorber.
A. yields acid of higher concentration than chamber process.
Fat dispersed in water is exemplified by
A. colloids
B. gel
C. butter
D. emulsion
C. butter
Maleic anhydride is produced by catalytic oxidation of
A. toluene
B. ethyl alcohol
C. naphthalene
D. benzene
D. benzene
Catalyst used in the oxidation of benzene to produce maleic anhydride is
A. V2O5
B. Pt
C. Ni
D. Cr
A. V2O5
Widely used method for the conditioning of boiler feed water is the
A. cold lime process
B. coagulation
C. hot-lime soda process
D. sequestration
C. hot-lime soda process
Pick out the wrong statement.
A. Low intensity explosives are also called propellants, whereas high intensity explosive are
called detonators.
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur.
C. Lead azide is a popular military explosive.
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.
Hydrocynic acid (HCN) is used as an insecticide for
A. controlling timber degradation by ants
B. controlling poultry lice
C. potato beetle
D. citrus fruits
D. citrus fruits
Acrylonitrile is mainly used in the __________ industry.
A. polymer
B. printing
C. dyeing
D. photographic
C. dyeing
The enzyme which converts starch into the disacharides maltose is
A. diastase
B. maltase
C. yeast
D. none of these
A. diastase
Pick out the false statement pertaining to water treatment.
A. Aeration of water is effective in CO2 removal.
B. The zeolite water softening process reduces the hardness of water by not more than 50%.
C. Sodium sulphate or sodium carbonate do not cause hardness in water.
D. Water with pH value less than 7, is acidic.
B. The zeolite water softening process reduces the hardness of water by not more than 50%.
Bordeaux mixture is a/an
A. fertiliser
B. inorganic fungicide
C. insecticide
D. explosive
B. inorganic fungicide
Blue colour is imparted to glass by the addition of
A. FeSO4
B. PbO
C. CaO
D. NaOH
C. CaO
In the manufacture of viscose rayon, the raw material used industrially is
A. recalyptious wood
B. bamboo
C. bagasse
D. fine teak wood
D. fine teak wood
Silicone is a/an
A. thermoplastic
B. inorganic polymer
C. monomer
D. none of these
B. inorganic polymer
Molasses is the starting material for the production of
A. alcohol
B. essential oil
C. fatty acids
D. massecuite
A. alcohol
BHC (Benzene hexachloride) is made by the chlorination of benzene
A. which is an addition reaction.
B. which is a substitution reaction.
C. in absolute dark.
D. in presence of sunlight.
A. which is an addition reaction.
Diaphragm electrolytic cell as compared to mercury electrolytic cell
A. produces 70% NaOH solution.
B. requires less specific power consumption for the production of chlorine.
C. requires lesser investment for similar
capacity.
D. all (a), (b) and (c).
C. requires lesser investment for similar
capacity.
Roasting of metallurgical ores is done mainly to
A. dehydrate it.
B. sinter the ore.
C. remove CO2 & H2O.
D. remove arsenic & sulphur.
D. remove arsenic & sulphur.
Calcareous & argillaceous materials are used in the manufacture of
A. lead
B. cement
C. carbon disulphide
D. none of these
B. cement
Pick out the wrong statement.
A. Azoic dyes are mostly applied on cotton fabrics.
B. Basic dyes (e.g. amino derivatives) are applied
mostly to paper.
C. Mordant dyes are applied mainly to wools.
D. none of these.
D. none of these.
Commercial production of calcium carbide requires limestone and __________ as raw materials.
A. coke
B. sand
C. soda ash
D. fuel oil
B. sand
Which one of the following is not likely to be a constituent of vegetable oils ?
A. Citric acid
B. Oleic acid
C. Stearic acid
D. Glycerol
A. Citric acid
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
A. sulphuric acid
B. phosphoric acid
C. hydrochloric acid
D. hydroflouric acid
A. sulphuric acid
The process involved in converting rubber into a thin sheet or coating it on fabric is called
A. extrusion
B. mastication
C. calendering
D. valcanisation
C. calendering
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
A. endothermic
B. exothermic
C. irreversible
D. both (b) and (c)
D. both (b) and (c)
Air used in aerobic fermentation must be sterilized, otherwise the
A. recovery of product will be difficult.
B. contamination of pure culture would result.
C. uniformity of product cannot be achieved.
D. none of these.
B. contamination of pure culture would result.
Alkylbenzene sulfonate (ABS) is a
A. detergent
B. rubber
C. pesticide
D. polyester
A. detergent
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
A. 7-14 and 14-30
B. 7-14 and 40-50
C. 14 - 30 and 40-50
D. 10 - 20 and 40 - 5
A. 7-14 and 14-30
Platinum is a versatile catalyst for many processes in
chemical industries. It is highly prone to be poisoned by
the presence of
A. carbon
B. arsenic
C. lead
D. sulphur
B. arsenic
Sodium chloride content in sea water is about __________ gms/litre.
A. 2
B. 10
C. 25
D. 50
C. 25
Fluorescent dyes are added in detergents to
A. act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.
B. attain distinctiveness from other brands.
C. act as tarnish inhibitor for metals like German silver.
D. none of these
A. act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
A. flocculate the impurities.
B. facilitate fast filtration.
C. both (a) and (b).
D. neither (a) nor (b)
C. both (a) and (b).
Polyvinyl chloride (PVC) is
A. a thermosetting material.
B. a condensation polymerisation product.
C. made by employing emulsion polymerisation.
D. none of these
C. made by employing emulsion polymerisation.
Bleaching of paper pulp is done with
A. activated clay
B. bromine
C. chlorine or chlorine dioxide
D. magnesium sulphite
C. chlorine or chlorine dioxide
Pick out the wrong statement.
A. Kraft method of pulp manufacture can process all types of fibrous raw materials.
B. Digestion time for bagasse is less than that for wood base materials.
C. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method.
D. none of these.
D. none of these.
Isopropyl benzene produced by alkylation of benzene with propylene is known as
A. neoprene
B. cumene
C. gelatin
D. mercaptans
B. cumene
Consider the production of ammonia from methane and
air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis.
A. i - Ni/Al2O3; ii - Cu - ZnO/Al2O3
B. i - Fe/Al2O3; ii - Cu - ZnO/Al2O3
C. i - Ni/Al2O3; ii - Fe/Al2O3
D. i - Fe/Al2O3; ii - Ni/Al2O3
C. i - Ni/Al2O3; ii - Fe/Al2O3
For the hydrogenation of oils __________ (A)
__________ is commonly used as catalyst and
__________ (B) __________ is a catalyst poison.
A. (A) platinum (B) sulphur
B. (A) palladium (B) oxygen
C. (A) nickel (B) sulphur
D. (A) nickel (B) oxygen
C. (A) nickel (B) sulphur
Main constituents of natural rubber is
A. polystyrene
B. polyisoprene
C. polybutadiene
D. polychloroprene
B. polyisoprene
Highly porous refractory bricks are
A. less susceptible to chemical attack by molten fluxes and gases etc.
B. very strong.
C. having very high thermal conductivity.
D. none of these.
D. none of these.
Fumigant insecticides
A. kill insects, when they eat it.
B. emit poisonous vapour.
C. are absorbed throughout the plant.
D. none of these.
B. emit poisonous vapour.
Which of the following is an endothermic reaction ?
A. Absorption of SO3 in 98% H2SO4.
B. C + H2O = CO + H2.
C. Thermal dissociation of iron pyrites.
D. Both (b) and (c).
D. Both (b) and (c).
Which of the following coals has the highest calorific value ?
A. Lignite
B. Sub-bituminous
C. Anthracite
D. Peat
C. Anthracite
Which of the following is not an abrasive material ?
A. Bakelite
B. Pumice
C. Corundum
D. Carborundum
A. Bakelite
Pick out the wrong statement.
A. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate.
B. Glass is decolorised during its manufacture by adding antimony oxide, mangnese dioxide or arsenic oxide.
C. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2.
D. Red color is imparted to glass by addition of arsenic oxide.
D. Red color is imparted to glass by addition of arsenic oxide.
Finely ground calcium aluminate & silicate is a/an
A. cermet
B. cement
C. abrasive
D. explosive
B. cement
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.
A. drying
B. semi-drying
C. non-drying
D. none of these
C. non-drying
Fats as compared to oils have
A. more unsaturated glycerides of fatty acids.
B. less unsaturated glycerides of fatty acids.
C. much higher reactivity to oxygen.
D. lower melting point.
B. less unsaturated glycerides of fatty acids.
Thermal pyrolysis of ethylene dichloride produces
A. trichloroethylene
B. vinyl chloride
C. ethanol amine
D. ethylene oxide
B. vinyl chloride
The main component of pyrex glass is
A. zinc
B. lead
C. boron
D. celenium
B. lead
Alum [Al2(SO4)3] is used as a coagulant in water
treatment to remove
A. colour
B. turbidity
C. bacteria
D. all (a), (b) and (c)
D. all (a), (b) and (c)
__________ is an ore concentrating metallurgical process involving a chemical change.
A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. none of these
C. Roasting
Basic oxide is absent in __________ glass.
A. flint
B. pyrex
C. quartz
D. all (a), (b) & (c)
C. quartz
Graphite is a/an
A. electrical insulator.
B. allotrope of carbon.
C. moderator used in nuclear reactor
D. both (b) and (c).
D. both (b) and (c).
Nylon-6 is a
A. polyamide
B. thermosetting resin
C. polyester
D. none of these
A. polyamide
Multistage catalytic converter is not used in the
A. conversion of SO2 to SO3
B. NH3 synthesis reaction.
C. both (a) & (b).
D. neither (a) nor (b)
B. NH3 synthesis reaction.
The main product of high temperature carbonisation of coal is
A. coke
B. ammonia
C. tar
D. phenol
A. coke
__________ is a thermosetting plastic.
A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene
B. Epoxy polymer
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
A. (NH4)2SO4
B. NH4Cl
C. (NH4)2 NO3
D. liquid NH3
A. (NH4)2SO4
Flexible foam (for mattresses) is usually made of
A. PVC
B. silicone
C. polyurethanes
D. polyamides
C. polyurethanes
Glycerine is a by-product of the __________ industry.
A. soap
B. detergent
C. oil hydrogenation
D. paint
A. soap
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
A. adjust the pH of the syrup.
B. remove the coloring matter from the syrup.
C. reduce the viscosity of the syrup.
D. improve the rate of crystallisation of sugar.
A. adjust the pH of the syrup.
Chalcopyrite is the main ore of
A. copper
B. lead
C. tin
D. iron
A. copper
Bio-degradable detergents
A. can be readily oxidised.
B. pose problem in sewerage plant.
C. have an isoparaffinic structure.
D. should not be used as it spoils the cloth.
A. can be readily oxidised.
The end bleaching agent used to move last traces of
colour bodies from the pulp is
A. chlorine dioxide (ClO2)
B. MgO
C. SO2 gas
D. mercaptans
A. chlorine dioxide (ClO2)
Which allotrope of sulphur is insoluble in carbon disulphide ?
A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of Sulphur
C. Plastic sulphur
Lubricating greases are a mixture of
A. mineral oil, soap and additives.
B. mineral oil and metallic soap.
C. mineral oil and fatty oil.
D. fatty oil and metallic soap.
A. mineral oil, soap and additives.
Metallic soap is __________ salt of fatty acids.
A. sodium
B. potassium
C. both sodium & potassium
D. aluminium or calcium
D. aluminium or calcium
Cation exchanger is regenerated usually with
A. NaOH
B. H2SO4
C. hydrazine
D. alum solution
B. H2SO4
Bitterns is a/an
A. unsaturated fat.
B. starting material for the production of iodine.
C. by-product of chlor-alkali industry.
D. none of these.
D. none of these.
The most widely used coagulant for removing suspended impurities from water is
A. bleaching powder
B. chlorine
C. calcium sulphate
D. alum
D. alum
Main constituent of limestone is
A. CaCO3
B. MgCO3
C. Na2CO3
D. CaSO4
A. CaCO3
__________ is obtained as a by-product in themanufacture of sodium hydroxide using brine.
A. Chlorine
B. Ammonium chloride
C. Sodium carbonate
D. Sodium bi-carbonate
A. Chlorine
Fat splitting catalyst is
A. CaCO3
B. ZnO
C. Al2O3
D. Fe
B. ZnO
Phthalic anhydride is used
A. in making PVC
B. as plasticisers
C. in insecticides manufacture
D. for making nylon-6
B. as plasticisers
Penicillin is separated from fermented broth by
A. extraction with amyl or butyl acetate.
B. ternery azeotropic distillation.
C. evaporation in calendria.
D. extractive distillation.
A. extraction with amyl or butyl acetate.
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
A. Coke breeze
B. Lime powder
C. Silica/quartz
D. Dolomite
C. Silica/quartz
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
A. teflon
B. bakelite
C. polyester
D. nylon-66
B. bakelite
Hydrogenation of oil does not
A. remove double bonds.
B. raise its melting point.
C. improve its resistance to oxidation.
D. none of these
D. none of these
Main constituents of cotton fiber is
A. lignin
B. cellulose
C. starch
D. gelatin
B. cellulose
Which is the most suitable dye for synthetic fibres ?
A. Acid dye
B. Azoic dye
C. Pigment dye
D. Mordant dye
A. Acid dye
Pick out the wrong statement.
A. Cold rubber (SBR) is superior as compared to hot rubber (SBR).
B. Polymerisation temperature can modify the properties of SBR.
C. Production of cold SBR employs lower pressure as compared to that of hot SBR.
D. none of these.
D. none of these.
Pick out the wrong statement.
A. Strongly caking coal should not be used in the Lurgi gasifier.
B. Acetylene gas can not be used for illumination purpose.
C. Water gas is called blue gas because of the color of the flame, when it is burnt.
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels.
B. Acetylene gas can not be used for illumination purpose.
Hydrolysis of sugar is called
A. hydration
B. inversion
C. esterification
D. none of these
B. inversion
Fish contains about __________ percent oil.
A. 5
B. 10
C. 20
D. 35
C. 20
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
A. avoid mechanical weakening of fibre.
B. remove lignin by way of crystallisation.
C. increase the cellulose content.
D. none of these
A. avoid mechanical weakening of fibre.
Polymethyl methacrylate (PMMA) is known as
A. bakelite
B. teflon
C. perspex
D. nylon-6
C. perspex
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
A. chromium
B. arsenic
C. copper
D. mangnese
C. copper
Percentage of alcohol in beer may be around __________ percent.
A. 2-8
B. 18-23
C. 27-32
D. 1-4
A. 2-8
Which of the following is an ore of iron?
A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite
C. Hematite
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
A. NH3
B. NaCl
C. CaO
D. Coke
A. NH3
High purity nitrogen is used in
A. making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils.
B. fire fighting purposes.
C. both (a) & (b).
D. neither (a) nor (b).
C. both (a) & (b).
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
A. coke and sand
B. brine and coal
C. coke and caustic soda
D. none of these
B. brine and coal
Naphthalene is removed from coke oven gas by
A. adsorbing on palladium.
B. absorbing in ethanolamine.
C. scrubbing with wash oil.
D. passing it through electrostatic precipitator
C. scrubbing with wash oil.
Which of the following is not present in bagasse fibre ?
A. Cellulose
B. Lignin
C. Pentogens
D. None of these
D. None of these
Nitric acid is not used in the manufacture of
A. detergents
B. fertilisers
C. aqua regia
D. explosives.
A. detergents
Naphthols are derivates of
A. methyl amine
B. naphthalene
C. phenol
D. xylene
B. naphthalene
Fermentation is adversely affected by the
A. presence of air.
B. absence of air.
C. high concentration.
D. presence of ammonium salts
C. high concentration.
Extraction of __________ employs an electrolytic process.
A. aluminium
B. silver
C. copper
D. all (a), (b) and (c)
A. aluminium
Dechlorination of treated water is necessary to
A. remove residual turbidity.
B. reduce the bacterial load on filter.
C. control taste and odour.
D. remove chlorinous taste.
D. remove chlorinous taste.
Fire clay is __________ refractory material.
A. a basic
B. an acidic
C. a neutral
D. not a
B. an acidic
An oil is converted into fat by its
A. hydrogenation
B. hydrolysis
C. hydrocracking
D. hydration
A. hydrogenation
Shaving soaps are
A. soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
B. metalic soaps compounded with frothing agents.
C. high free alkali soaps having excess of cane sugar and alcohol.
D. none of thes
A. soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
