Chemical Process Flashcards
Oxidation of SO2 to SO3 is favoured by
low temperature and low pressure.
low temperature and high pressure.
high temperature and low pressure.
high temperature and high pressure.
low temperature and high pressure.
Gun powder, which is an explosive comprises of charcoal, sulphur and
glycerene
salt petre
nitro glycerene
dynamite
salt petre
Starting raw material for the manufacture of alum is
alumina
gypsum
bauxite
ammonium bicarbonate
bauxite
Salt cake is chemically represented by
Na2SO4
CaSO4.H2O
MgSO4
BaSO4
Na2SO4
Which of the following sugars is the sweetest?
Glucose
Fructose
Sucrose
Lactose
Fructose
Paper pulp produced by kraft/sulphate process is
bleached easily
dull white in color
strong fibrous
dark colored
strong fibrous
Claude process of gas liquefaction employs
merely compression of gas beyond its critical pressure.
Joule-Thomson expansion cooling.
heat exchange with colder stream.
adiabatic expansion against a piston or in a turbine.
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.
manufacture of cationic detergent.
treatment of spent fuel of nuclear reactor.
none of these.
drilling of petroleum wells and pickling of steel sheets.
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
exothermic
endothermic
catalytic
autocatalytic
endothermic
Viscose rayon is chemically
cellulose nitrate
regenerated cellulose nitrate
cellulose acetate
regenerated cellulose acetate
regenerated cellulose acetate
All enzymes are made of
fats
carbohydrates
proteins
amino acids
proteins
The combustion reaction, C + O2 = CO2, is
exothermic
endothermic
autocatalytic
none of these
exothermic
Styrene is produced from ethyl benzene by the process of
dehydrogenation
oxidation
alkylation
dehydration
dehydrogenation
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
callagen
tannin
molasses
carbohydrate
callagen
The chamber process is
preferred over contact process for producing 98 to 100% H2SO4 and various oleums.
non-catalytic and operates only on pyrites.
a batch process for directly producing high strength (98 to 100%) H2SO4.
none of these.
none of these.
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
1 - 2
15 - 20
50 - 60
80 - 85
15 - 20
Fusel oil is a/an
essential oil.
extract from medicinal herbs.
mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
none of these.
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
Poorer tensile strength.
poorer resistance to oxidation.
greater amount of heat build-up under heavy loading.
all (a), (b) and (c).
all (a), (b) and (c).
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
CaO
MnO2
ZnO
FeS
ZnO
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
dilute H2SO4
oleum
ultraviolet light
none of these
oleum
Haemoglobin is a/an
amino acid
biological catalyst
protein
enezyme
protein
Epoxy resin
is a good adhesive.
is an elastomer.
cannot be used for surface coatings.
is a polyester.
is a good adhesive.
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
10
25
50
98
50
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
High cost of mercury.
High specific gravity of mercury.
Non-availability of high purity mercury.
Pollution of water stream by mercury.
Pollution of water stream by mercury.
Esterification reaction produces
detergent
vanaspati
soap
mercaptans
soap
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
adsorbs
oxidises
reduces
converts
adsorbs
Producer gas consists mainly of
CO, CO2 N2, H2
CO, H2
H2, CH4
C2H2, CO2, H2
CO, CO2 N2, H2
Neoprene is the trade name of
polyurathane
phenol formaldehyde
polychloroprene
styrene-butadiene rubber
polychloroprene
Hard water
does not affect the lather formation by soap.
is not unfit for drinking purpose.
pollutes the water stream.
all (a), (b) and (c).
is not unfit for drinking purpose.
Which of the following is an organo-metal-lic compound ?
Isopropyl alcohol
Tetra-ethyl lead
Zeolite
Cumene
Tetra-ethyl lead
Sulphur addition in soap is done to
improve the soap texture.
cure pimples & dandruff.
fasten lather formation.
increase its cleansing action.
cure pimples & dandruff.
Phosphate rock is a raw material for the manufacture of
phosphoric acid
phosphorous
superphosphates
all (a), (b) and (c)
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
poor oxidation stability and high gum forming tendency.
greater tendency of decomposition at elevated temperature.
hydrolysis tendency in presence of water.
all (a), (b) and (c).
all (a), (b) and (c).
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
Soda ash
Limestone
Silica
Iron oxide
Esterification reaction
produces soap.
is reversible.
is a reaction between an alcohol and an organic acid.
all (a), (b) and (c).
all (a), (b) and (c).
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 800 °C
10 atm., 170-180°C
1 atm., 170 - 180°C
l atm., 800°C
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
calcium sulphate
sodium chloride
sodium sulphate
magnesium chloride.
sodium chloride
Pick out the endothermic reaction out of the following.
C+O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO +O2 = CO2
CaCO3 = CaO + CO2
Pasteurisation of milk means
removal of fatty and albuminous substance from it.
killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
inhibiting the growth of micro-organisms without killing them.
none of these.
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.
alum
limestone
coke
quartz
limestone
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Ostwald’s
Bosch
Solvay
Haber’s
Solvay
Polycaprolactum is commercially known as
nylon-6
nylon-66
dacron
rayon
nylon-6
Frasch process is for
making oxygen
producing helium
mining sulphur
making nitrogen
mining sulphur
Very fine suspended and colloidal impurities are removed from water by a process called
sedimentation
coagulation
disinfection
softening
coagulation
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
its calorific value is very less.
tar neutralises the residual acids present in pitch.
it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
all (a), (b) and (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 ?
C
CO
CO2
H2
CO
The drug used in contraceptives is
sulphadizene
mestranol
methyl salicylate
pencillin
mestranol
Raw materials used for producing __________ cement does not contain iron oxide.
waterproof
slag
white
pozzolan
white
In the Lurgi coal gasifier
coking coals cannot be used.
low carbon conversion efficiency is achieved.
entrainment of solids is higher.
large quantity of coal can be processed.
large quantity of coal can be processed.
Neon gas is
flammable in nature.
used in color discharge tube.
filled in lamps having tungsten filament.
all (a), (b) and (c).
used in color discharge tube.
Calgon used in water treatment is chemically
sodium phosphate
sodium hexametaphosphate
calcium phosphate
tricresyl phosphate
sodium hexametaphosphate
Which oil is preferred for paint manufacture ?
Drying oil
Non-drying oil
Semi-drying oil
Saturated oil
Drying oil
Styrene butadiene rubber (SBR) is
a natural rubber.
a synthetic polymer.
a synthetic monomer.
another name of silicone rubber.
a synthetic polymer.
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
1 atm & 100°C
5 atm & 275°C
100 atm & 500°C
50 atm & 1000°C
5 atm & 275°C
Glycerine is not used in the
manufacture of explosive.
conditioning and humidification of tobacco.
manufacture of pharmaceuticals.
none of these.
none of these.
Cumene is the starting material for the production of
benzoic acid
phenol and acetone
isoprene
styrene
phenol and acetone
The type of high refractive index glass used in optical instruments is __________ glass.
pyrex
flint
crookes
none of these
flint
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
nickel
vanadium
alumina
iron
vanadium
Most commonly used rubber vulcanising agent is
sulphur
bromine
platinum
alumina
sulphur
Terylene is
same as dacron
a polyester
both (a) & (b)
neither (a) nor(b)
both (a) & (b)
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
more than
same
none of these
less than
Dehydrogenation of isopropanol produces
propyl alcohol
acetone
trichloroethylene
formaldehyde
acetone
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
Soap powder is prepared by mixing soap with hydrated sodium carbonate.
Detergents differ from soaps in their action in hard water.
Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
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
crystallisation
vacuum crystallisation
atmospheric distillation
dehydration
vacuum crystallisation
Helium is produced on commercial scale from
air
natural gas
coke oven gas
none of these
natural gas
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
< - 5
100 - 150
250 - 300
20 - 30
The catalyst used in the manufacture of DDT is
alumina.
silica.
20% oleum.
aluminium chloride.
20% oleum.
Most widely and commonly used coagulant for the removal of suspended impurities in water is
bleaching powder
slaked lime
alum
copper sulphate
alum
_________ is used as a catalyst in fat splitting.
ZnO
Ni
V2O5
FeO
ZnO
Which of the following is not produced on commercial scale from sea water?
Bromine.
Magnesium compounds.
Potassium compounds.
Sodium sulphate.
Sodium sulphate.
Heating of __________ to 120°C, produces plaster of paris.
blue vitriol
gypsum
calcium silicate
calcium sulphate
gypsum
Pick out the wrong statement.
Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%.
The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide.
Vitriol oil is nothing but technical sulphuric acid.
Decomposition of sulphuric acid on heating does not start before its boiling.
Decomposition of sulphuric acid on heating does not start before its boiling.
Which of the following has sodium bicarbonate as its main constituent ?
Baking soda
Baking powder
Washing soda
none of these
Baking powder
Ordinary glass is not a/an
amorphous isotropic material.
supercooled liquid.
material with sharp definite melting point.
electrical insulator.
material with sharp definite melting point.
In premitive days, __________ was being manufactured by Leblanc Process.
alum
washing soda
soda ash
calcium carbide
soda ash
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa).
Redcar (U.K.).
Los-Angles (U.S.A.).
Trombay (India).
SASOL (in South Africa).
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
fixed
fluidised
entrained
moving
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting.
are prone to rancid oxidation.
always contain some amount of nickel (as their complete removal is very difficult).
have affinity to retain harmful sulphur compounds.
cause cholesterol build up and blood clotting.
Paper grade bamboo contains about __________ percent cellulose.
5
20
40
60
5
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
surfactant
builder
optical brightening agent
anti soil redeposition agent
anti soil redeposition agent
Vulcanisation of rubber
decreases its tensile strength.
increases its ozone & oxygen reactivity.
increases its oil & solvent resistance.
converts its plasticity into elasticity.
converts its plasticity into elasticity.
Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
salt, limestone and coke or gas.
ammonia, salt and limestone.
ammonia limestone and coke.
none of these.
salt, limestone and coke or gas.
Chloral is used in the manufacture of
DDT
BHC
parathion
none of these
DDT
Bromine is used in the preparation of
fire extinguishing compounds.
fire proofing agents.
dyes and antiknock compounds.
all (a), (b) and (c).
all (a), (b) and (c).
The process used for the manufacture of ethyl alcohol from molasses is
distillation
dehydration
dehydrogenation
none of these
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.
75
< 10
> 30
50
< 10
Absorption of SO3 in 97% H2SO4 is
exothermic
endothermic
not possible
none of these
exothermic
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
Solvay
Ostwald’s
Haber’s
none of these
Ostwald’s
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
fertiliser manufacture
car battery solution
synthesis of oleum
water treatment
car battery solution
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
alumina
silica gel
platinum
nickel
alumina
A good quality coal should have
low fusion point of ash
high ash content
high sulphur content
none of these
none of these
Zeolite used in water softening process (cation exchange) is regenerated by washing with
brine
chloramines
sodium bisulphite
liquid chlorines
brine
The catalyst used in shift converter is
nickel
vanadium
silica gel
alumina
nickel
Which of the following is a detergent ?
Benzene hexachloride
Alkyl benzene sulphonate
Polytetraflouroethylene
Cellulose nitrate
Alkyl benzene sulphonate
Drinking (potable) water treatment does not involve
coagulation
sedimentation
softening
disinfection
softening
Phenol formaldehyde resin is used as an adhesive in making
laminates
card boxes
furniture
books
laminates
Pick out the correct statement.
A fat is converted into oil by its hydrogenation.
There is no difference between a fat and an oil so far as its physical properties are concerned.
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.
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.
prevent sulphonation of the monochlorobenzene by the acid catalyst.
achieve non-hygroscopic property.
none of these.
avoid its decomposition.
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
V2O5 & Cr2O3.
oxides of nitrogen & Cr2O3.
V2O5 on a porous carrier & oxides of nitrogen.
oxides of nitrogen & V2O5 on a porous carrier.
oxides of nitrogen & V2O5 on a porous carrier.
DDT stands for
diethyl-diphenyl-trichloromethane.
dichloro-diphenyl-trichloromethane.
diphenyl-dichloro-trichloromethane.
dichloro-diphenyl-trichloroethane.
dichloro-diphenyl-trichloroethane.
Phosphoric acid is prepared from
cryolite
chalcopyrite
rock phosphate
none of these
rock phosphate
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
as a lubricant.
as a rust preventive.
in hard water for cleaning of cloth.
as a foam depressant in distillation column.
as a lubricant.
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
Diaphragm electrolytic cell process
Mercury electrolytic cell process
Lime-soda process
None of these
Lime-soda process
Bleaching action of bleaching powder is due to its __________ properties.
reducing
oxidising
disinfecting
none of these
oxidising
Solvent extracted oil
has low free fatty acid content.
is odourless.
has more of unsaturates.
none of these.
none of these.
Which of the following is not required in the manufacture of soda ash by Solvay process ?
Ammonia
Limestone
Nitric acid
None of these
Nitric acid
Saponification number of an oil or fat
gives an idea about its molecular weight.
is inversely proportional to its molecular weight.
detects its adulteration.
all (a), (b) & (c).
all (a), (b) & (c).
The purpose of tanning in leather industry is to
stiffen the leather.
smoothen the leather.
make it flexible.
impart water resistance.
stiffen the leather.
Lime and soda ash are added to water to remove
bicarbonates & sulphates of calcium and magnesium.
undersirable taste and odour.
bacteria.
its corrosiveness.
bicarbonates & sulphates of calcium and magnesium.
Kaoline is a/an
refractory material
synthetic resin
artificial abrasive
blue pigment
refractory material
Hydrogenation of edible vegetable oils
is an exothermic reaction.
increases their melting point.
is done in presence of nickel catalyst.
all (a), (b) and (c).
all (a), (b) and (c).
Phenol is mainly used
to produce benzene.
to produce phenol formaldehyde.
to produce polyester resin.
as a plasticiser for unsaturated polyster.
to produce phenol formaldehyde.
Main constituent of dolomite is
CaCO3
MgCO3
K2CO3
Na2CO3
MgCO3
Conversion of CO to CO2 by steam in presence of a catalyst is called
steam reforming.
shift conversion.
steam gasification.
none of these.
shift conversion.
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
L.D. converter
blast furnace
rotary kiln
recuperator
recuperator
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
SO3
Cl2
NH3
SO2
Cl2
Plasticisers are added to paints to
make it corrosion resistant.
make glossy surface.
give elasticity & prevent cracking of the film.
increase atmospheric oxidation.
give elasticity & prevent cracking of the film.
Resistance to fusion of the refractory under a steady rising temperature condition is called
spalling
refractoriness
both (a) & (b)
neither (a) nor (b)
refractoriness
Portland cement consists mainly of
CaO & SiO2
SiO2 & Al2O3
CaO & Al2O3
CaO & Fe2O3
CaO & SiO2
_________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
Soda lime
Lead
High silica
Pyrex
The amount of benzene present in pure benzol is about __________ percent.
30
50
70
90
70
Cumene (isopropyl benzene) is made by
oxidation of napthalene.
propylene alkylation of benzene.
polymerisation of a mixture of benzene & propylene.
none of these.
propylene alkylation of benzene.
Which of the following is not a pyrite ore?
Celestite
Galena
Gypsum
Siderite
Siderite
Mannheim furnace is used in the manufacture of
hydrochloric acid.
H2SO4 by Chamber process.
calcium carbide.
corundum.
hydrochloric acid.
Thermosetting materials:
are cross-linked molecules.
soften on application of heat.
are solvent soluble.
none of these.
are cross-linked molecules.
Pick out the wrong statement. Iodine value of an oil or fat is
the number of grams of iodine taken up by 100 gm of oil or fat.
a measure of its unsaturation.
helpful in findings its adulteration & its suitability for making soap.
independent of the type of oil, whether it is drying or non-drying.
independent of the type of oil, whether it is drying or non-drying.
Nickel is not used as a catalyst in the
Fischer-Tropsch process.
shift conversion.
hydrogenation of oil.
Ostwald’s process of HNO3 manufacture.
Ostwald’s process of HNO3 manufacture.
_________ iron is the purest form of iron.
Cast
Wrought
Pig
High silicon
Wrought
Enamels
give good glossy finish.
are same as varnish.
are prepared from non-drying oil.
do not contain pigment.
give good glossy finish.
Black liquor is converted into white liquor by
evaporation and burning the concentrate followed by causticisation of products.
multi-effect evaporation only.
selective liquid extraction.
extractive distillation.
evaporation and burning the concentrate followed by causticisation of products.
Varnish does not contain
thinner
pigment
both (a) & (b)
neither (a) nor (b)
pigment
Alcohol is produced by the
oxidation of an aldehyde
hydrolysis of an ether
esterification of a fat
none of these
hydrolysis of an ether
Varnish does not contain
pigment
thinner
dryer
anti-skimming agent
pigment
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
polyurethane
silicone
teflon
epoxy resin
teflon
Solvent used for extraction of oil is
hexane
methyl ethyl ketone
furfurol
none of these
hexane
Insulin is an __________ drug.
anti-malarial
anti-TB
antibiotic
none of these
none of these
Liquor poisoning generally occurs due to the presence of __________ in it.
ethyl alcohol
impurities
methyl alcohol
carbonic acid
methyl alcohol
Neoprene is chemically known as
polybutadiene
styrene butadiene rubber (SBR)
polyurathane
polychloroprene
polychloroprene
Pick out the wrong statement.
Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%.
Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%.
75% oleum can be produced by distillation of 20% oleum.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol.
In nylon-6, the number 6 represents the total number of carbon atoms in the ring.
Raw materials for DDT manufacture are benzene and chlorine.
Ethanolamines are produced by using ammonia and ethylene oxide as raw material.
Raw materials for DDT manufacture are benzene and chlorine.
Molecular weights of polymers are in the range of
10^2 - 10^2
10^5 - 10^9
10^2 - 10^7
10^9 - 10^11
10^2 - 10^7
Sulphur removal by heating of pyrite ore in presence of air is called its
reduction
roasting
calcination
smelting
roasting
Deacon’s method is used for the manufacture of
glauber’s salt
common salt
chlorine
graphite electrode
chlorine
Pick out the true statement pertaining to water treatment.
Slow sand filters can remove colour completely.
Activated carbon can be used for taste & odour control without subsequent filtration.
Application of activated carbon reduces the temporary hardness of water.
Normally, the turbidity is removed by adding a coagulent prior to sedimentation.
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.
lead
borosilicate
soda lime
alkali silicate
borosilicate
Prussian blue is chemically represented by
FeO.TiO2
Ca SO4 . 2H2O
Fe4 [Fe (CN6)3]
AlF3 . 3NaF
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
hydrochloric acid
methyl alcohol
formic acid
nitric acid
The most stable allotropic form of phosphorous is the __________ phosphorous.
white
black
yellow
red
black
Function of thinner in a paint is to
accelerate the oxidation of oil.
prevent gelling of the paint.
suspend pigments & dissolve film forming materials.
form a protective film.
suspend pigments & dissolve film forming materials.
Starting material for the production of styrene butadiene rubber (SBR) is
ethyl alcohol
ethylene
both (a) & (b)
neither (a) nor (b)
both (a) & (b)
Which one of the following is not an elastomer ?
Polyisoperene
Neoprene
Nitrile-butadiene
None of these
None of these
Which of the following processes can remove both temporary as well as permanent hardness of water ?
Filtration
Boiling
Distillation
None of these
Distillation
Dacron is a
condensation product of hexam-ethylene diamine and adipic acid.
thermosetting material.
condensation product of dimethyl terephthalate and ethylene glycol.
none of these.
none of these.
Rancidity of the fatty oil can be reduced by its
decoloration
hydrogenation
oxidation
purification
hydrogenation
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
high cost
fragile nature
easy poisoning tendency
all (a), (b) and (c)
all (a), (b) and (c)
_________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Tackiness
Boiling of water containing temporary hardness produces
CO2
CaSO4
CaHCO3
none of these
CO2
Starting material for the commercial production of ethyl alcohol in India is
rice
molasses
fruit of Mahua tree
maize
molasses
Phenol formaldehyde
employs addition polymerisation.
employs condensation polymerisation.
is a monomer.
is an abrasive material.
employs condensation polymerisation.
Which of the following is not an insecticide?
Hydrocyanic acid
Nicotine
Sodium flouride
Hexane
Hexane
Shrinkage volume in cement setting does not depend upon the
sand to cement ratio.
water to cement ratio.
ambient temperature fluctuation.
drying period.
sand to cement ratio.
Bisphenol A is produced by the condensation of acetone with
formaldehyde
ethyl alcohol
diethyl ether
phenol
phenol
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
sodium sulphide & sodium carbonate.
sodium sulphite & sodium carbonate.
sodium sulphite & sodium sulphide.
none of these.
sodium sulphide & sodium carbonate.
Presence of carbonaceous matter in the sewage
causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures.
reduces sulphate ions to sulphides causing obnoxious smell.
increases the quantity of chlorine used for its purification.
all (a), (b) and (c).
all (a), (b) and (c).
A mineral is termed as ‘ore’, if
a metal can be economically extracted from it.
it contains ≥ 40% metal.
the metal present in it is costly.
all (a), (b) and (c).
a metal can be economically extracted from it.
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
gives higher conversion efficiency.
has a longer life and is not poisoned by arsenic.
handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant.
all (a), (b) and (c).
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 )
P
√P
P2
1/P
√P
Oleum produces fumes of
SO2
H2SO4
SO3
SO2 + H2SO4
SO3
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4.
H2SO4 and 80kg of SO3.
SO3 for each 100 kg of H2SO4.
none of these.
SO3 and 80kg of H2SO4.
Chloramines are used in water treatment for
disinfection and control of taste & odour.
corrosion control.
removing turbidity.
control of bacteria.
disinfection and control of taste & odour.
Glycerine is recovered from lye by
evaporation followed by vacuum distillation.
liquid extraction technique.
extractive distillation technique.
none of these.
evaporation followed by vacuum distillation.
Inversion of sucrose produces
fructose
glucose
both (a) & (b)
neither (a) nor (b)
glucose
Enzymes are organic catalysts used in the __________ reactions.
chemical
biochemical
photochemical
electrochemical
biochemical
Linde process of gas liquefaction employs
exchange of heat with colder stream.
adiabatic expansion through a throttle valve (Joule-Thomson expansion).
adiabatic expansion against a piston or in a turbine.
merely compressing the gas beyond its critical pressure.
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.
10
50
80
95
50
Ore concentration by froth floatation utilises the __________ of ore particles.
density difference
wetting characteristics
terminal velocities
none of these
wetting characteristics
The main use of activated carbon in water treatment is to control
bacterial growth
taste and odour
turbidity
none of these
taste and odour
The most commonly used substance to speed up the sedimentation of sewage is
lime
sulphuric acid
chlorine
sodium bisulphite
lime
Sucrose is a
monosacchride
disacchride
polysacchride
none of these
disacchride
Sugar content in sugarcane on cane basis is about __________ percent by weight.
1 to 5
5 to 10
15 to 20
20 to 30
5 to 10
Pick out the wrong statement.
Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively.
Protein catalysts are called enzymes.
The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes.
Total sugar content in molasses is about 10%.
Total sugar content in molasses is about 10%.
The major use of butadiene is
as a plasticiser for unsaturated polyester.
in the manufacture of synthetic rubber.
as an anti-skinning agent in paint.
none of these.
in the manufacture of synthetic rubber.
The manufacture of Kraft pulp is done by a/an __________ process.
alkaline
acidic
neutral
none of these
alkaline
Antibiotic
inhibits/destroys the growth of microorganisms.
is used as a pain reliever.
is an antimalarial.
is an anaesthetic.
inhibits/destroys the growth of microorganisms.
Which of the following paper does not require a filler during manufacture ?
Bond paper
Writing paper
Blotting paper
Coloured paper
Blotting paper
Industrial production of chloroform requires acetone and
phosgene
calcium hypochlorite
chlorine
ammonium chloride
calcium hypochlorite
Pencillin, an antibiotic drug was discovered by
Alexender
Flaming
Dr. Zivago
none of these
Alexender
Styrene (a monomer for the production of polystyrene) is commercially produced by
catalytic dehydrogenation of ethyl benzene.
dehydration of ethyl alcohol followed by hydrogenation.
reacting ethylene oxide with acetal-dehyde.
fermentation of starch.
catalytic dehydrogenation of ethyl benzene.
Hydrogenation of oil takes place in a/an __________ reactor.
autothermal
trickle bed
plug flow
none of these
trickle bed
Fatty material used in soap making is
fatty acid
fatty alcohols
tallow
detergents
tallow
__________ glass is used for the manufacture of optical glass.
Pyrex
Soda
Flint
Crooke’s
Flint
Thermosetting plastic materials
can be repeatedly melted.
is useful for melt casting.
can not be melted after forming.
is useful for spinning.
can not be melted after forming.
Favourable conditions for the liquefaction of gases in general are
high pressure & low temperature.
low pressure & high temperature.
high pressure & high temperature.
low pressure & low temperature.
high pressure & low temperature.
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
furnace → converter → absorber
furnace → evaporator → absorber
furnace → converter → evaporator
converter → furnace → absorber
furnace → converter → absorber
_________ nature of hypo (sodium thiosulphate) makes it useful in photography.
Oxidising
Reducing
Complex forming
Photochemical
Complex forming
_________ is an ore of lead.
Quartz
Galena
Siderite
Chalcopyrite
Galena
Which of the following is an yellow pigment ?
Titanium dioxide
Ferrous sulphate
Lead chromates
Zinc sulphides
Lead chromates
Catalytic oxidation of toluene produces
styrene
phenol
benzene
tri-nitro-toluene
phenol
SO2 is bubbled through hot sugar cane juice to
act as an acidifying agent.
increase its concentration.
increase the amount of molasses.
increase the crystal size.
act as an acidifying agent.
The noble gas which occurs most abundantly in the atmosphere is
helium
neon
krypton
argon
argon
Main constituents of portland cement are calcium aluminate and
gypsum
silicates
sodium silicate
carbonates
silicates
Pick out the wrong statement.
High early strength cement are made from materials having high silica to lime ratio.
The function of gypsum in cement is to enhance its initial setting rate.
Acid resistant cements are known as silicate cement.
Major component of greyish portland cement is tricalcium silicate.
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
electrolytic
solar evaporation
vacuum evaporation
freeze drying
Which of the following is a detergent ?
Fatty alcohol
Alkyl benzene sulphonate (ABS)
Fatty acids
Methylene chloride
Alkyl benzene sulphonate (ABS)
Sulphuric acid is mainly used in the __________ industry.
fertiliser
steel
paper
paint
fertiliser
Pick out the wrong statement pertaining to nitric acid.
About 90% of nitric acid is manufactured by Ostwald’s process.
It is a strong mono basic acid which reacts with almost all the metals except noble metals.
Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2).
Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Alcohol percentage in molasses may be around
10
40
70
85
40
Main use of hydrazine is
as a rocket fuel
in water treatment
as a disinfectant
as fire retardant
as a rocket fuel
Main use of liquid nitrogen is in
rocket propulsion.
making gun powder.
detergent manufacture.
refrigerative cooling.
refrigerative cooling.
Comparing sulphate process with sulphite process, we find that __________ in the latter.
both temperature & pressure in the former is less than that
both temperature & pressure in the former is more than that
temperature is more in the former whereas pressure is more
pressure is more in the former whereas temperature is less
both temperature & pressure in the former is more than that
Which of the following is a disaccharide ?
Sucrose
Glucose
Starch
Maltose
Sucrose
Proximate analysis of coal determines its __________ content.
moisture, ash, sulphur & volatile matter
moisture & volatile matter
moisture, sulphur, nitrogen & fixed carbon
none of these
moisture & volatile matter
Pick out the exothermic reaction out of the following:
C + H2O = CO + H2
CaC2 + H2O = Ca(OH)2 + C2H2
MgCO3 = MgO + CO2
all (a), (b) and (c)
CaC2 + H2O = Ca(OH)2 + C2H2
__________ is produced using polycondensation reaction.
Polythene
Phenol formaldehyde
Poly vinyl chloride
none of these
Phenol formaldehyde
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.
phthalic anhydride
vinyl chloride
maleic anhydride
dacron
vinyl chloride
In industrial nomenclature, alcohol means
butyl alcohol
propyl alcohol
ethanol
methyl alcohol
ethanol
Which of the following is the purest form of water out of the following ?
Underground water
Rain water
Well water
Lake water
Rain water
Use of water having dissolved oxygen in boilers promotes
corrosion
sequestration
scale formation
none of these
corrosion
Unsaturated oils compared to saturated oils have
lower melting point & higher reactivity to oxygen.
higher melting point & higher reactivity to oxygen.
lower melting point & lower reactivity to oxygen.
higher melting point & lower reactivity to oxygen.
lower melting point & higher reactivity to oxygen.
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
increases
increases linearly
decreases
decreases linearly
decreases
Chemical formula of oleum is
H2SO3
H2SO4
H2S2O7
H2SO7
H2S2O7
Electrodeposition of metals i.e. electroplating is never done on
metals
alloys
refractories
non-metals
refractories
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
cutting
fibrillation
hydration
strengthening
strengthening
The biochemical treatment applied to sewage effluents is a process of
dehydration
reduction
oxidation
polymerisation
oxidation
Ultimate analysis of coal determines its __________ content.
carbon, hydrogen, nitrogen & sulphur
carbon, ash, sulphur & nitrogen
carbon, sulphur, volatile matter & ash
carbon, volatile matter, ash & moisture
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.).
1
10
25
40
10
Sucrose content in cane sugar may be around __________ percent.
50
70
80
95
95
Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of
final rolling out of paper.
cutting of fibres.
hydration of fibres.
fibrillation of fibre.
final rolling out of paper.
Yellow glycerine is made into white, using
activated carbon
diatomaceous earth
bauxite
bentonite
activated carbon
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
-5 to 0
5 to 10
30 to 50
75 to 80
30 to 50
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
reverse osmosis
sand filter
lime soda
permutit
reverse osmosis
Major component of flint glass is
lead oxide
silica
alumina
soda
lead oxide
Gypsum is chemically
calcium chloride
potassium sulphate
sodium sulphate
calcium sulphate
calcium sulphate
Calcination of gypsum produces
plaster of paris
salt cake
nitre cake
lime
plaster of paris
Phthalic anhydride is produced by the oxidation of
naphthalene
benzene
toluene
aniline
benzene
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
flint
soda
pyrex
potash
pyrex
Zeigler process
produces high density polyethylene.
produces low density polyethylene.
uses no catalyst.
employs very high pressure.
produces high density polyethylene.
Massecuite is
used for paper making.
used as a cattle feed.
highly acidic in nature.
none of these.
none of these.
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
70
55
80
94
94
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
hard
soft
metallic
lubricating
soft
Synthetic glycerine is produced from
toluene
phenol
propylene
naphthalene
propylene
A ‘unit process’ is exemplified by the
distillation
hydrogenation of oils
absorption
humidification
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 slow reaction.
a discontinuous reaction (requiring regeneration of iron by water gas intermittently).
still in development stage (by employing fluidised bed technique).
all (a), (b) and (c).
all (a), (b) and (c).
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
reduce its viscosity.
increase its viscosity.
reduce the variation in its viscosity with temperature.
increase the variation in its viscosity with temperature.
reduce the variation in its viscosity with temperature.
Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction
decreases with decrease of thickness of the flakes.
increases with the increasing flake size keeping the flake thickness constant.
increases Considerably with the rise of temperature.
decreases as the moisture content of flakes increases.
decreases as the moisture content of flakes increases.
Sea weeds are an important source of
fluorine
chlorine
bromine
iodine
iodine
Polythene is a/an __________ polymerisation product.
addition
condensation
thermosetting
none of these
addition
Catalytic oxidation-dehydrogenation of methyl alcohol produces
formaldehyde
phenol
acetone
maleic anhydride
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
increasing the oxygen concentration.
putting more quantity of V2O5 catalyst in the converter.
removing some quantity of SO3 during intermediate stage.
maintaining low temperature & pressure in the converter.
removing some quantity of SO3 during intermediate stage.
Tall oil obtained as a by-product from the black liquor recovery is
a black, sticky & viscous liquid.
used in the manufacture of greases, emulsions & soaps.
composed mainly of rosin & fatty acids.
all (a), (b) & (c).
all (a), (b) & (c).
__________ is a polysacchride.
Maltose
Starch
Sucrose
Glucose
Starch
Styrene is produced from ethyl benzene by the process of
dehydrogenation
oxidation
alkylation
dehydration
dehydrogenation
Acetone is produced by catalytic dehydrogenation of
phenol
naphthalene
isopropanol
ethyl benzene
isopropanol
Nitrogen is an essential component of
mineral salts
carbohydrates
fats
proteins
proteins
Bromine content in sea water may be around __________ ppm.
70
640
1875
2500
70
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is
0.14
0.34
0.94
1.4
0.94
Poly tetraflouro ethylene (P.T.F.E.) is known as
bakelite
teflon
celluloid
decron
teflon
Bakelite is
same as poly tetrafluoroethylene (PTFE).
an inorganic polymer.
same as thermosetting phenol-formaldehyde.
not a polymer.
same as thermosetting phenol-formaldehyde.
__________ is produced by the dehydrogenation of ethyl benzene.
Styrene
Ethyl alcohol
Cumene
Phenol
Styrene
Which of the following is used as a coagulant in water treatment ?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide
Ferrous sulphate
__________ paper is used in the manufacture of newsprint paper.
Groundwood
Board
Tissue
Wrapping
Groundwood
