Chemical Process Flashcards
Oxidation of SO2 to SO3 is favoured by
low temperature and high pressure.
Gun powder, which is an explosive comprises of charcoal, sulphur and
salt petre
Starting raw material for the manufacture of alum is
bauxite
Salt cake is chemically represented by
Na2SO4
Which of the following sugars is the sweetest?
Fructose
Paper pulp produced by kraft/sulphate process is
strong fibrous
Claude process of gas liquefaction employs
adiabatic expansion against a piston or in a turbine.
The main use of HCl is in the
drilling of petroleum wells and pickling of steel sheets.
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
endothermic
Viscose rayon is chemically
regenerated cellulose acetate
All enzymes are made of
proteins
The combustion reaction, C + O2 = CO2, is
exothermic
Styrene is produced from ethyl benzene by the process of
dehydrogenation
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
callagen
The chamber process is
none of these.
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
15 - 20
Fusel oil is a/an
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
all (a), (b) and (c).
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
ZnO
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
oleum
Haemoglobin is a/an
protein
Epoxy resin
is a good adhesive.
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
50
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
Pollution of water stream by mercury.
Esterification reaction produces
soap
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
adsorbs
Producer gas consists mainly of
CO, CO2 N2, H2
Neoprene is the trade name of
polychloroprene
Hard water
is not unfit for drinking purpose.
Which of the following is an organo-metal-lic compound ?
Tetra-ethyl lead
Sulphur addition in soap is done to
cure pimples & dandruff.
Phosphate rock is a raw material for the manufacture of
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
all (a), (b) and (c).
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
Esterification reaction
all (a), (b) and (c).
In sulphate pulp manufacture, the pressure and temperature in the digestor is
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
sodium chloride
Pick out the endothermic reaction out of the following.
CaCO3 = CaO + CO2
Pasteurisation of milk means
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.
limestone
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Solvay
Polycaprolactum is commercially known as
nylon-6
Frasch process is for
mining sulphur
Very fine suspended and colloidal impurities are removed from water by a process called
coagulation
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
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 ?
CO
The drug used in contraceptives is
mestranol
Raw materials used for producing __________ cement does not contain iron oxide.
white
In the Lurgi coal gasifier
large quantity of coal can be processed.
Neon gas is
used in color discharge tube.
Calgon used in water treatment is chemically
sodium hexametaphosphate
Which oil is preferred for paint manufacture ?
Drying oil
Styrene butadiene rubber (SBR) is
a synthetic polymer.
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm & 275°C
Glycerine is not used in the
none of these.
Cumene is the starting material for the production of
phenol and acetone
The type of high refractive index glass used in optical instruments is __________ glass.
flint
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
vanadium
Most commonly used rubber vulcanising agent is
sulphur
Terylene is
both (a) & (b)
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
Dehydrogenation of isopropanol produces
acetone
Pick out the wrong statement.
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
vacuum crystallisation
Helium is produced on commercial scale from
natural gas
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
The catalyst used in the manufacture of DDT is
20% oleum.
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
__________ is used as a catalyst in fat splitting.
ZnO
Which of the following is not produced on commercial scale from sea water?
Sodium sulphate.
Heating of __________ to 120°C, produces plaster of paris.
gypsum
Pick out the wrong statement.
Decomposition of sulphuric acid on heating does not start before its boiling.
Which of the following has sodium bicarbonate as its main constituent ?
Baking powder
Ordinary glass is not a/an
material with sharp definite melting point.
In premitive days, __________ was being manufactured by Leblanc Process.
soda ash
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa).
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting.
Paper grade bamboo contains about __________ percent cellulose.
5
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
Vulcanisation of rubber
converts its plasticity into elasticity.
Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
salt, limestone and coke or gas.
Chloral is used in the manufacture of
DDT
Bromine is used in the preparation of
all (a), (b) and (c).
Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
The process used for the manufacture of ethyl alcohol from molasses is
none of these
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
< 10
Absorption of SO3 in 97% H2SO4 is
exothermic
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
Ostwald’s
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
car battery solution
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
alumina
A good quality coal should have
none of these
Zeolite used in water softening process (cation exchange) is regenerated by washing with
brine
The catalyst used in shift converter is
nickel
Which of the following is a detergent ?
Alkyl benzene sulphonate
Drinking (potable) water treatment does not involve
softening
Phenol formaldehyde resin is used as an adhesive in making
laminates
Pick out the correct statement.
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
avoid its decomposition.
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
oxides of nitrogen & V2O5 on a porous carrier.
DDT stands for
dichloro-diphenyl-trichloroethane.
Phosphoric acid is prepared from
rock phosphate
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
as a lubricant.
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
Lime-soda process
Bleaching action of bleaching powder is due to its __________ properties.
oxidising
Solvent extracted oil
none of these.
Which of the following is not required in the manufacture of soda ash by Solvay process ?
Nitric acid
Saponification number of an oil or fat
all (a), (b) & (c).
The purpose of tanning in leather industry is to
stiffen the leather.
Lime and soda ash are added to water to remove
bicarbonates & sulphates of calcium and magnesium.
Kaoline is a/an
refractory material
Hydrogenation of edible vegetable oils
all (a), (b) and (c).
Phenol is mainly used
to produce phenol formaldehyde.
Main constituent of dolomite is
MgCO3
Conversion of CO to CO2 by steam in presence of a catalyst is called
shift conversion.
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
recuperator
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
Cl2
Plasticisers are added to paints to
give elasticity & prevent cracking of the film.
Resistance to fusion of the refractory under a steady rising temperature condition is called
refractoriness
Portland cement consists mainly of
CaO & SiO2
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
The amount of benzene present in pure benzol is about __________ percent.
70
Cumene (isopropyl benzene) is made by
propylene alkylation of benzene.
Which of the following is not a pyrite ore?
Siderite
Mannheim furnace is used in the manufacture of
hydrochloric acid.
Thermosetting materials
are cross-linked molecules.
Pick out the wrong statement. Iodine value of an oil or fat is
independent of the type of oil, whether it is drying or non-drying.
Nickel is not used as a catalyst in the
Ostwald’s process of HNO3 manufacture.
__________ iron is the purest form of iron.
Wrought
Enamels
give good glossy finish.
Black liquor is converted into white liquor by
evaporation and burning the concentrate followed by causticisation of products.
Varnish does not contain
pigment
Alcohol is produced by the
hydrolysis of an ether
Varnish does not contain
pigment
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
teflon
Solvent used for extraction of oil is
hexane
Insulin is an __________ drug.
none of these
Liquor poisoning generally occurs due to the presence of __________ in it.
methyl alcohol
Neoprene is chemically known as
polychloroprene
Pick out the wrong statement.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Pick out the wrong statement.
Raw materials for DDT manufacture are benzene and chlorine.
Molecular weights of polymers are in the range of
102 - 107
Sulphur removal by heating of pyrite ore in presence of air is called its
roasting
Deacon’s method is used for the manufacture of
chlorine
Pick out the true statement pertaining to water treatment.
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.
borosilicate
Prussian blue is chemically represented by
Fe4 [Fe (CN6)3]
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
nitric acid
The most stable allotropic form of phosphorous is the __________ phosphorous.
black
Function of thinner in a paint is to
suspend pigments & dissolve film forming materials.
Starting material for the production of styrene butadiene rubber (SBR) is
both (a) & (b)
Which one of the following is not an elastomer ?
None of these
Which of the following processes can remove both temporary as well as permanent hardness of water ?
Distillation
Dacron is a
none of these.
Rancidity of the fatty oil can be reduced by its
hydrogenation
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
all (a), (b) and (c)
__________ of rubber decreases after its vulcanisation.
Tackiness
Boiling of water containing temporary hardness produces
CO2
Starting material for the commercial production of ethyl alcohol in India is
molasses
Phenol formaldehyde
employs condensation polymerisation.
Which of the following is not an insecticide?
Hexane
Shrinkage volume in cement setting does not depend upon the
sand to cement ratio.
Bisphenol A is produced by the condensation of acetone with
phenol
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
sodium sulphide & sodium carbonate.
Presence of carbonaceous matter in the sewage
all (a), (b) and (c).
A mineral is termed as ‘ore’, if
a metal can be economically extracted from it.
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
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 )
sqrt P
Oleum produces fumes of
SO3
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4.
Chloramines are used in water treatment for
disinfection and control of taste & odour.
Glycerine is recovered from lye by
evaporation followed by vacuum distillation.
Inversion of sucrose produces
glucose
Enzymes are organic catalysts used in the __________ reactions.
biochemical
Linde process of gas liquefaction employs
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.
50
Ore concentration by froth floatation utilises the __________ of ore particles.
wetting characteristics
The main use of activated carbon in water treatment is to control
taste and odour
The most commonly used substance to speed up the sedimentation of sewage is
lime
Sucrose is a
disacchride
Sugar content in sugarcane on cane basis is about __________ percent by weight.
5 to 10
Pick out the wrong statement.
Total sugar content in molasses is about 10%.
The major use of butadiene is
in the manufacture of synthetic rubber.
The manufacture of Kraft pulp is done by a/an __________ process.
alkaline
Antibiotic
inhibits/destroys the growth of microorganisms.
Which of the following paper does not require a filler during manufacture ?
Blotting paper
Industrial production of chloroform requires acetone and
calcium hypochlorite
Pencillin, an antibiotic drug was discovered by
Alexender
Styrene (a monomer for the production of polystyrene) is commercially produced by
catalytic dehydrogenation of ethyl benzene.
Hydrogenation of oil takes place in a/an __________ reactor.
trickle bed
Fatty material used in soap making is
tallow
__________ glass is used for the manufacture of optical glass.
Flint
Thermosetting plastic materials
can not be melted after forming.
Favourable conditions for the liquefaction of gases in general are
high pressure & low temperature.
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
furnace → converter → absorber
__________ nature of hypo (sodium thiosulphate) makes it useful in photography.
Complex forming
__________ is an ore of lead.
Galena
Which of the following is an yellow pigment ?
Lead chromates
Catalytic oxidation of toluene produces
phenol
SO2 is bubbled through hot sugar cane juice to
act as an acidifying agent.
The noble gas which occurs most abundantly in the atmosphere is
argon
Production of alcohol by fermentation of molasses is an __________ process.
aerobic
Main constituents of portland cement are calcium aluminate and
silicates
Pick out the wrong statement.
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.
freeze drying
Which of the following is a detergent ?
Alkyl benzene sulphonate (ABS)
Sulphuric acid is mainly used in the __________ industry.
fertiliser
Pick out the wrong statement pertaining to nitric acid.
Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Alcohol percentage in molasses may be around
40
Main use of hydrazine is
as a rocket fuel
Main use of liquid nitrogen is in
refrigerative cooling.
Comparing sulphate process with sulphite process, we find that __________ in the later.
both temperature & pressure in the former is more than that
Which of the following is a disacchride ?
Sucrose
Proximate analysis of coal determines its __________ content.
moisture & volatile matter
Pick out the exothermic reaction out of the following:
CaC2 + H2O = Ca(OH)2 + C2H2
__________ is produced using polycondensation reaction.
Phenol formaldehyde
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.
vinyl chloride
In industrial nomenclature, alcohol means
ethanol
Which of the following is the purest form of water out of the following ?
Rain water
Use of water having dissolved oxygen in boilers promotes
corrosion
Unsaturated oils compared to saturated oils have
lower melting point & higher reactivity to oxygen.
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
decreases
Chemical formula of oleum is
H2S2O7
Electrodeposition of metals i.e. electroplating is never done on
refractories
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
strengthening
The biochemical treatment applied to sewage effluents is a process of
oxidation
Ultimate analysis of coal determines its __________ content.
carbon, hydrogen, nitrogen & sulphur
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.).
10
Sucrose content in cane sugar may be around __________ percent.
95
‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of
final rolling out of paper.
Yellow glycerine is made into white, using
activated carbon
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
30 to 50
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
reverse osmosis
Major component of flint glass is
lead oxide
Gypsum is chemically
calcium sulphate
Calcination of gypsum produces
plaster of paris
Phthalic anhydride is produced by the oxidation of
benzene
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
pyrex
Zeigler process
produces high density polyethylene.
Massecuite is
none of these.
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
94
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
soft
Synthetic glycerine is produced from
propylene
A ‘unit process’ is exemplified by the
hydrogenation of oils
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is
all (a), (b) and (c).
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
reduce the variation in its viscosity with temperature.
Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction
decreases as the moisture content of flakes increases.
Sea weeds are an important source of
iodine
Polythene is a/an __________ polymerisation product.
addition
Catalytic oxidation-dehydrogenation of methyl alcohol produces
formaldehyde
In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by
removing some quantity of SO3 during intermediate stage.
Tall oil obtained as a by-product from the black liquor recovery is
all (a), (b) & (c).
__________ is a polysacchride.
Starch
Styrene is produced from ethyl benzene by the process of
dehydrogenation
Acetone is produced by catalytic dehydrogenation of
isopropanol
Nitrogen is an essential component of
proteins
Bromine content in sea water may be around __________ ppm.
70
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is
0.94
Poly tetraflouro ethylene (P.T.F.E.) is known as
teflon
Bakelite is
same as thermosetting phenol-formaldehyde.
__________ is produced by the dehydrogenation of ethyl benzene.
Styrene
Which of the following is used as a coagulant in water treatment ?
Ferrous sulphate
__________ paper is used in the manufacture of newsprint paper.
Groundwood
Hydrodenation of vegetable oils is a/an __________ reaction.
exothermic
Permanent hardness of water is due to the presence of calcium & magnesium
sulphates & chlorides
Concentration of sulphide ores is done usually by
froth floatation
Dacron is a/an
polyester
Sodium carbonate (soda ash) is not used in the manufacture of
detergents
Viscose rayon
utilises H2SO4, NaOH and CS2 during its manufacture.
Nylon 6-6 is manufactured from
hexamethylene diamine and adipic acid.
Glauber’s salt is chemically represented by
Na2SO4.10H2O
Chemical name of Grignard reagent is
ethyl magnesium chloride.
Which of the following processes is absent in glass manufacturing process ?
Sintering
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
2.5
Dacron (or terylene) fibres as compared to nylon’fibres have
all (a), (b) and (c).
Grignard reagent is chemically known as
ethyl magnesium chloride.
The function of gypsum addition during cement making is to
decrease the cement setting rate.
Low purity oxygen is used for
chemical oxidation processes.
__________ is produced using molasses as the starting raw material.
ethyl alcohol
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
sharp melting points.
A substance produced by a living organism and capable of anti-microbial activity is called a/an
antibiotic
Deaeration of water in its treatment is necessary, as it
minimises its corrosiveness.
Hydrochloric acid is also known as
muriatic acid
Aryl benzene sulphonate (ABS) is a
detergent
Adipic acid is an intermediate in the manufacture of
nylon-66
The temperature in the calcium carbide furnace is __________ °C.
2000-2200
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm2 & 500°C.
Soaps remove dirt by
none of these.
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
Calcium & aluminium stearate
Chemical name of soda ash is
none of theseOut of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
neutral sulphite semi-chemical
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
Limestone
Gun powder uses
all (a), (b), & (c)
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
trichloroethane
The basic difference between vegetable oils and fats is in their
physical state
Which of the following is not a food additive?
Ammonium chloride
Alum is commercially produced from
bauxite
CaO is called
quick lime
Starting raw material for the manufacture of maleic anhydride is
either (a) or (b)
Pick out the wrong statement.
Presence of sodium sulphate in pulp makes the pulp bleachability poor.
Which of the following contains least amount of N2 ?
Coke oven gas
Calcination of limestone is not done in a __________ kiln for producing lime.
fixed bed
Neoprene is a
synthetic rubber
Saponification value/number of an oil or fat is a measure of its
average molecular weight.
Ethyl alcohol cannot be produced
none of these.
Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.
15-30
Cement mainly contains
CaO, SiO2, Al2O3
Sand and __________ is fused at 1300°C, to produce sodium silicate.
soda ash
Coke used for the production of calcium carbide should have
all (a), (b) and (c).
Sucrose is a disaccharide consisting of
glucose and fructose
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
remove unexposed silver halide.
High temperature carbonisation of coal takes place at __________ °C.
1100
White phosphorous is stored under water, because
its kindling temperature in dry air is very low.
__________ is not a constituent of gun powder.
Carbon
Hydrophilic group of a soap or detergent solution is
water loving
Rotary kiln is not involved in the production of
slaked lime from quick lime
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
60-70
Vanillin is a type of
flavour
Temporary hardness of water can be removed by
boiling
More than 100 percent of __________ is present in oleum.
H2SO4
Pure rectified spirit contains about __________ percent alcohol.
95
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-183
Titanium dioxide is a/an __________ colour pigment.
white
Mercury cells for caustic soda manufacture, compared to diaphragm cells
none of these.
Cellulose percentage in bamboo fibre is about
50
Essential oils are usually obtained using
steam distillation
Impurities present in brine is normally removed by treatment with
all (a), (b) and (c).
Hydrogenation of oil/fat does not
none of these.
Solvay process as compared to dual process (i.e. modified Solvay process)
both (b) and (c).
Builders are added in soap to act as
cleaning power booster
H2S is scrubbed from refinery gases by absorption using
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?
Oxidation of Cl- ions
Zeolite is a/an
naturally occuring clay which is capable of exchanging cations.
Type of glass used in optical work is the __________ glass.
lead
Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process.
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
Teflon
Glass is
a super cooled liquid
Analgesic drugs are
pain relievers
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.
-183
Commonly used glass is known as the __________ glass.
soda
Fusion of limestone and __________ produces high alumina cement.
bauxite
Massacuits is a terminology used in the __________ industry.
sugar
The basic constituent of vegetable oils is
triglyceride
The most economical pulp for the production of newsprint would be the __________ pulp.
groundwood
Which of the following is the second major component of cement ?
SiO2
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
all (a), (b) and (c).
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Chromates
L.D. converter is used in the production of
steel
The terminology ‘BTX’ used in coal tar distillation industry refers to
benzene-toluene-xylene.
Which of the following is not responsible for causing permanent hardness of water ?
Ca(HCO3)2
In the Solvay process, the product from the calciner is
light soda ash
Commercially ethylene is produced from naphtha by
hydrocracking
Poly Vinyl Chloride (P.V.C.) is a __________ material.
thermoplastic
Pig iron is produced by blast furnaces in India using mostly the iron ore named
hematite
The difference between saponification value and acid value is
called ester value.
Fourdrinier machine is used in the manufacture of
paper
Pencillin is made employing __________ fermentation process.
aerobic batch
Sulphuric acid saturated with SO3 is called
oleum
Nylon 66 is so named because the
average degree of polymerisation of the polymer is 1966.
Wet chlorine gas produced during electrolysis of brine is dehydrated by
spraying 66° Be H2SO4 counter current to the flow of the gas.
CaSO4 .1/2 H2O is known as
plaster of Paris
__________ of quicklime produces slaked lime.
Hydration
Main product in calcium carbide-water reaction is
C2H2
Glauber’s salt is chemically
none of these
Which of the following fuel gases contains maximum amount of carbon monoxide ?
L.D. converter gas
Baking soda is chemically represented by
NaHCO3
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
teflon
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?
Depithing
Percentage of glycerene present in the spent lye obtained during soap manufacture is about
5
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
10
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
hydrogenation
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
AgO
Phenolic antiseptics are added in the __________ soap.
medicated
Solvay process is used for the manufacture of
soda ash
A mixture of chlorine & sodium bromide acts as a/an
fire retardant
Which is a high grade pulp ?
Sulphate pulp
Stereospecific agents are exemplified by
all (a), (b) & (c)
Starting material for the production of butadiene in India is
ethyl alcohol
Yellow phosphorus is transported under
water
Permanent hardness of water can be removed by
passing it through cation & anion exchangers.
Celluloid is chemically
cellulose nitrate
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
sulphuric acid
Which of the following is an explosive ?
All (a), (b), and (c)
Zeolite is used in the
water treatment.
Thermoplastic materials
none of these.
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of
perchloroethylene
Salt is added in the kettle during soap manufacture to separate
soap from lye.
Manufacture of phthalic anhydride uses __________ as a catalyst.
V2O5
Which of the following is not a product of coal tar distillation ?
None of these
Teflon is
poly tetrafluoroethylene (P.T.F.E.).
Chrome tanning and vegetable tanning are done for
light & heavy leather respectively.
Catalyst used during the manufacture of ‘Vanaspati Ghee’ is
nickel
Iron ore hametite is concentrated using
gravity separation.
Refractory bricks burnt at very high temperature have got
greater resistance to corrosion by slags.
Nitrile rubber is produced by the polymerisation of
acrylonitrile and butadiene.
Carbon disulphide is mainly used in the production of
viscose rayon.
99.5% purity oxygen is used in
all (a), (b), and (c).
Nylon-6 is manufactured from
caprolactum
Permanent hardness of water can be removed by
boiling it with Na2CO3.
Sizing material is incorporated in paper to
impart resistance to penetration by liquids.
Pick out the wrong statement.
Oils and fats are alkaloids.
Which of the following, when pyrolysed, produces perchloro-ethylene ?
Carbon tetrachloride
Chemical name of aspirin (an analgesic drug) is
acetylsalicylic acid
Which is the most efficient absorbant for SO3 out of the following ?
98%H2SO4
Coal tar is used as a
all (a), (b) and (c).
Caprolactum (a raw material for nylon-6 manufacture) is produced from
benzene
The purpose of adding Na2CO3 to water of low alkalinity is to
permit the use of alum as a coagulant.
Ca(OH)2 is called
slaked lime
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
Potassium is kept & transported under
kerosene oil
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
electrolytic reduction
Bakelite is chemically known as
phenol formaldehyde
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
H2
Phthalic anhydride is made by the
oxidation of naphthalene.
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
cyclo trimethylene trinitramine.
Raw material used in alcohol distilleries in India is
molasses
Oil produced by solvent extraction
neither (a) nor (b).
High acid value of an oil or fat is an indication of
storage under improper conditions.
Yeast is used in the manufacture of
wine
Liquefaction of gases can not be done by
merely compressing it beyond critical pressure.
Anion exchanger is regenerated usually with
NaOH
__________ is the major constituent of the Portland cement.
Tricalcium silicate
Catalytic oxidation of naphthalene produces
phthalic anhydride
Parathion and Malathion are
pesticides
Transparent soaps (e.g. Pears) are
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
styrene
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
dacron
Lindane is
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
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?
Sodium borate
In the production of soda ash by Solvay process, the by-product is
CaCl2
The ideal pulp for the manufacture of paper should have high __________ content.
cellulose
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
independent of
Which of the following is a constituent of vinegar ?
Both (a) and (b)
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).
Kopper-Totzek coal gasifier
can give ammonia synthesis gas (H2 + N2).
Addition of calcium oxide to water produces
all (a), (b) & (c)
Sodium bisulphite is used for __________ water.
both (a) & (b)
Riboflavin is a/an
vitamin
Flash point of most vegetable oils is about __________ °C.
200
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).
Dense soda ash used in the manufacture of glass, is chemically represented by
Na2CO3.H2O
Reverse osmosis is normally used for the
desalination of brackish water to produce potable (drinking) water.
Hydrazine is largely used
as rocket fuel.
‘Synthesis gas’ meant for the synthesis of organic compound is a variable mixture of
CO & H2
Litharge is
lead oxide
Coagulant is used __________ filtration.
before
10% oleum comprises of 10% free
SO3
Use of chlorine in the treatment of sewage
helps in grease separation.
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
precipitation
A unit operation is exemplified by the process of
desorption
The major constituents of glass are
sand, lime and soda ash
Margarine is a/an
fat
Oils and fats are converted to soap in a process called
saponification
Glycerine can be obtained from
fat
Blue vitriol is chemically
copper sulphate
Trinitro-toluene (TNT) is
an explosive.
Thorium is mainly used
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
avoid corrosion.
Good quality of edible salt is obtained from brine by the process of
vacuum evaporation
Electric bulbs are made of __________ glass.
flint
Which of the following is used as a binding material in soap to improve soap texture ?
Borax
An alkali metal salt of palmitic acid is known as
metallic soap
Washing soda is chemically represented by
Na2CO3.10H2O
Magnesium and calcium __________ cause temporary hardness of water.
bicarbonates
Which form of sulphur is the most stable at room temperature ?
Rhombic
Vegetable oils and fats basically differ in their
physical state
Average sulphur content in Indian pyrites is about __________ percent.
35
Oil is a/an
mixture of glycerides of fatty acids.
Which of the following is a constituent of coffee ?
Caffeine
Which of the following is the main constituent of the mother liquor produced in salt industry ?
Bromine
Silicon carbide is a/an
abrasive
Oxygen is produced by fractionation of air using __________ process.
either (a) or (b)
Trinitrotoluene (TNT), an explosive, is made by the nitration of
toluene
Which of the following is used as a coagulant in treating turbid water ?
Ferric sulphate
Carborundum consists mainly of
silicon carbide
Wax is a
mixture of esters of polyhydric alcohols excepting glycerine.
Catalyst used in the hydrogenation of oil is
nickel
Viscose rayon is
none of these.
Triple superphosphate is manufactured by reacting
phosphate rock with phosphoric acid.
Use of hydrated lime in water treatment
all (a), (b) and (c).
Higher vicosity index of a lubricating oil denotes
less changes in fluidity of oil with temperature.
Le-Blanc process is a primitive process for the manufacture of
soda ash
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
1000°C
Cement setting under water employs a/an __________ process.
hydration
__________ are added in lacquers to remove film brittleness and to improve adhereness.
Plasticisers
Washing of coal is done to
both(b) and (c).
Systemic insecticides
are absorbed throughout the plant.
Dry ice (solidified CO2) is used for the
storage & shipment of frozen foods and ice-creams.
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
diamine and the dibasic acid.
Chemical formula of BHC, which is an insecticide is
C6H6Cl6
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
enzyme
Pick out the wrong statement.
Benzene hexachloride is not a contact insecticide.
The product obtained on mixing calcium oxide with water is called
slaked lime
The major constituent of black liquor generated during paper manufacture is sodium
carbonate
Plaster of Paris is
both (a) and (b)
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
detergent
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.
98
Coke oven gas consists mainly of
H2, & CH4
Chemical name of ‘alum’ is
aluminium sulphate.
Lithopaneis
ZnS (white pigment)
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?
Cl2, H2 & NaOH solution.
__________ acid is the main constituent of cotton seed oil.
Linoleic
Chemical formula of ‘salt cake’ is
Na2SO4
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in
all (a), (b) and (c).
Nicotine is
both (a) and (b).
Separation of fresh water from sea water can be done by the __________ operation.
reverse osmosis
Na2CO3.10H2O is called
washing soda
Reaction of an alcohol with organic acid is called the __________ reaction.
esterification
Ethanol amine is produced using ammonia and
ethylene oxide
__________ acid is an unsaturated fatty acid.
Oleic
CO & H2 are the constituents of
all (a), (b) and (c)
Economics of ‘Solvay Process’ depends upon the efficiency of
ammonia recovery and size of the plant
__________ is a thermosetting plastic.
Bakelite
Na2CO3 is called
soda ash
Flux addition during smelting of ore is done to
remove impurities/gangue.
Hydrazine is used in water treatment for the removal of
dissolved oxygen
Direct conversion of chemical energy into electrical energy is done in a
fuel cell.
Which of the following is not produced commercially from sea water ?
Iodine
Pick out the wrong statement.
none of these.
Nylon-6 as compared to Nylon-66 is having higher
none of these
Digestion of wood-base materials (for manufacture of pulp) is done to
remove lignin.
Soap cannot be used with hard water, because
they form insoluble calcium soaps which precipitate.
Which of the following is not an antibiotic ?
Quinine
The most reactive allotropic form of phosphorus is __________ phosphorus.
yellow
Plasticisers are added to synthetic plastics to
all (a), (b) and (c).
Rosin soap is added during paper manufacture to
impart resistance to penetration by liquids.
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by
iron-steam reaction.
Carboxymethyl cellulose (CMC) is added in detergents to
prevent redeposition of soil on cleaned surface.
Synthesis gas is a mixture of
CO and H2
Which of the following impurities in feed water for high pressure boiler is the most detrimental ?
Silica
Which glass is usually used in optical work?
Lead glass
Fourdrinier machine is used in the manufacture of
paper
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
anionic
Reaction of calcium carbide with water produces a gas, which is used
both (a) & (b).
Salt is the basic raw material for the manufacture of
caustic soda
Pick out the wrong statement.
TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.
Hydrazine (N2H4) is used mainly as a/an
rocket fuel
Hydrocynic acid (HCN) is used as an insecticide for
citrus fruits
Molecular weight of plastics ranges from
20000 to 250000
Acrylonitrile is mainly used in the __________ industry.
dyeing
The enzyme which converts starch into the disacharides maltose is
diastase
Pick out the false statement pertaining to water treatment.
The zeolite water softening process reduces the hardness of water by not more than 50%.
Presence of H2S in raw water (to be chlorinated) results in the
increased dosage of chlorine to provide a disinfecting residual in the water.
Contact process of sulphuric acid manufacture
yields acid of higher concentration than chamber process.
Fat dispersed in water is exemplified by
butter
Maleic anhydride is produced by catalytic oxidation of
benzene
Catalyst used in the oxidation of benzene to produce maleic anhydride is
V2O5
Widely used method for the conditioning of boiler feed water is the
hot-lime soda process
Blue colour is imparted to glass by the addition of
CaO
In the manufacture of viscose rayon, the raw material used industrially is
fine teak wood
Bordeaux mixture is a/an
inorganic fungicide
Silicone is a/an
inorganic polymer
Nickel is not used as a catalyst in the __________ reaction.
shift conversion
Roasting of metallurgical ores is done mainly to
remove arsenic & sulphur.
Molasses is the starting material for the production of
alcohol
BHC (Benzene hexachloride) is made by the chlorination of benzene
which is an addition reaction.
Diaphragm electrolytic cell as compared to mercury electrolytic cell
requires lesser investment for similar capacity.
Calcareous & argillaceous materials are used in the manufacture of
cement
Pick out the wrong statement.
none of these.
Commercial production of calcium carbide requires limestone and __________ as raw materials.
coke
Which one of the following is not likely to be a constituent of vegetable oils ?
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
sulphuric acid
The process involved in converting rubber into a thin sheet or coating it on fabric is called
calendering
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
both (b) and (c)
Air used in aerobic fermentation must be sterilized, otherwise the
contamination of pure culture would result.
Alkylbenzene sulfonate (ABS) is a
detergent
High temperature carbonisation of coal produces
none of these.
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
Setting of plaster of paris is accompanied with
hydration
Process conditions in fermentator used for production of penicillin is
25°C, 2 atm.
Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
arsenic
Sodium chloride content in sea water is about __________ gms/litre.
25
Fluorescent dyes are added in detergents to
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
both (a) and (b).
Polyvinyl chloride (PVC) is
made by employing emulsion polymerisation.
Bleaching of paper pulp is done with
chlorine or chlorine dioxide
Pick out the wrong statement.
none of these.
Isopropyl benzene produced by alkylation of benzene with propylene is known as
cumene
Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis.
i - Ni/Al2O3; ii - Fe/Al2O3
For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison.
(A) nickel (B) sulphur
Main constituents of natural rubber is
polyisoprene
Highly porous refractory bricks are
none of these.
Fumigant insecticides
emit poisonous vapour.
Which of the following is an endothermic reaction ?
Both (b) and (c).
Fermentator temperature during production of alcohol from molasses is around __________ °C.
30
Which of the following coals has the highest calorific value ?
Anthracite
Which of the following is not an abrasive material ?
Bakelite
Pick out the wrong statement.
Red color is imparted to glass by addition of arsenic oxide.
Finely ground calcium aluminate & silicate is a/an
cement
Cooking liquor in case of sulphite process is
sodium sulphite and sodium bisulphite.
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
10-30
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.
non-drying
Fats as compared to oils have
less unsaturated glycerides of fatty acids.
Thermal pyrolysis of ethylene dichloride produces
vinyl chloride
The main component of pyrex glass is
lead
Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove
all (a), (b) and (c)
__________ is an ore concentrating metallurgical process involving a chemical change.
Roasting
Basic oxide is absent in __________ glass.
quartz
Graphite is a/an
both (b) and (c).
Nylon-6 is a
polyamide
Enzymes are
all (a), (b) and (c).
Multistage catalytic converter is not used in the
NH3 synthesis reaction.
The main product of high temperature carbonisation of coal is
coke
__________ is a thermosetting plastic.
Epoxy polymer
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
(NH4)2SO4
Flexible foam (for mattresses) is usually made of
polyurethanes
Glycerine is a by-product of the __________ industry.
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
adjust the pH of the syrup.
Permanent hardness of water can be removed by
all (a), (b), and (c).
Chalcopyrite is the main ore of
copper
The end bleaching agent used to move last traces of colour bodies from the pulp is
chlorine dioxide (ClO2)
Bio-degradable detergents
can be readily oxidised.
Sea water contains about __________ ppm of bromine.
70
Which allotrope of sulphur is insoluble in carbon disulphide ?
Plastic sulphur
Lubricating greases are a mixture of
mineral oil, soap and additives.
Metallic soap is __________ salt of fatty acids.
aluminium or calcium
Cation exchanger is regenerated usually with
H2SO4
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
water forms an acid mist, which is difficult to absorb.
Bitterns is a/an
none of these.
The most widely used coagulant for removing suspended impurities from water is
alum
Main constituent of limestone is
CaCO3
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Fat splitting catalyst is
ZnO
Phthalic anhydride is used
as plasticisers
Penicillin is separated from fermented broth by
extraction with amyl or butyl acetate.
__________ process is used for producing soda ash.
Solvay
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
slaked lime
Which of the following is an unsaturated fatty acid ?
Oleic acid
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Silica/quartz
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
bakelite
Hydrogenation of oil does not
none of these.
Main constituents of cotton fiber is
cellulose
CaCl(OCl) is the chemical formula of
bleaching powder
Which is the most suitable dye for synthetic fibres ?
Acid dye
Pick out the wrong statement.
none of these.
Pick out the wrong statement.
Acetylene gas can not be used for illumination purpose.
Hydrolysis of sugar is called
inversion
Sulphuric acid completely saturated with sulphur trioxide is called
concentrated sulphuric acid.
Fish contains about __________ percent oil.
20
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
avoid mechanical weakening of fibre.
Polymethyl methacrylate (PMMA) is known as
perspex
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
copper
Percentage of alcohol in beer may be around __________ percent.
2-8
Which of the following is an ore of iron ?
Hematite
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
NH3
High purity nitrogen is used in
both (a) & (b).
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
brine and coal
Naphthalene is removed from coke oven gas by
scrubbing with wash oil.
The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.
1600
Which of the following is not present in bagasse fibre ?
None of these
Nitric acid is not used in the manufacture of
detergents
Naphthols are derivates of
naphthalene
Fermentation is adversely affected by the
high concentration.
Extraction of __________ employs an electrolytic process.
aluminium
Dechlorination of treated water is necessary to
remove chlorinous taste.
Fire clay is __________ refractory material.
an acidic
An oil is converted into fat by its
hydrogenation
Production of one ton of cement requires about __________ tons of limestone.
1.2
Low temperature carbonisation of coal takes place at __________ °C.
700
Shaving soaps are
soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
