INDIABIX-CHEMICAL PROCESS Flashcards
Oxidation of SO2 to SO3 is favored by
A. low temperature and low pressure.
B. low temperature and high pressure.
C. high temperature and low pressure.
D. high temperature and high pressure.
B. low temperature and high pressure.
Gun powder, an explosive, comprises of
charcoal, sulfur and .
A. glycerin
B. saltpeter
C. nitroglycerin
D. dynamite
B. saltpeter
The starting raw material for the manufacture
of alum is .
A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate
C. bauxite
Paper pulp produced by kraft/sulfate process
is .
A. bleached easily
B. dull white in color
C. strong & fibrous
D. dark colored
C. strong & fibrous
Claude process of gas liquefaction employs
A. merely compression of gas beyond its critical pressure.
B. Joule-Thomson expansion cooling.
C. heat exchange with colder stream.
D. adiabatic expansion against a piston or in a turbine.
D. adiabatic expansion against a piston or in a turbine.
Viscose rayon is chemically .
A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate
D. regenerated cellulose acetate
Styrene is produced from ethyl benzene by
the process of .
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration
A. dehydrogenation
Gelatin which is a nitrogenous organic protein
is obtained by the hydrolysis of .
A. tannin
B. molasses
C. chitin
D. collagen
D. collagen
Sucrose content in the raw juice extracted
from sugar cane is about %.
A. 1 - 2
B. 15 - 20
C. 50 - 60
D. 80 - 85
B. 15 - 20
Fusel oil is a/an
A. essential oil.
B. extract from medicinal herbs.
C.mixture of higher molecular weight alcohols (a
by-product obtained during production of alcohol
from molasses).
D. none of these
C.mixture of higher molecular weight alcohols (a
by-product obtained during production of alcohol
from molasses).
Styrene-butadiene-rubber (SBR) as
compared to natural rubber has .
A. poorer tensile strength.
B. poorer resistance to oxidation.
C.greater amount of heat build-up under
heavy loading.
D. all (a), (b) and (c).
D. all (a), (b) and (c).
Coefficient of thermal expansion of glass is
decreased by the addition of during its
manufacture.
A. CaO
B. MnO2
C. ZnO
D. FeS
C. ZnO
The catalyst used in the manufacture of DDT (from
chloral and chlorobenzene) is
A. dilute H2SO4
B. oleum
C. ultraviolet light
D. none of these
B. oleum
Epoxy resin
A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.
A. is a good adhesive.
Which of the following is the most adverse factor
challenging the choice of mercury electrolytic cell
process for the production of caustic soda?
A. High cost of mercury.
B. High specific gravity of mercury.
C. Non-availability of high purity mercury.
D. Pollution of water stream by mercury
D. Pollution of water stream by mercury
Esterification reaction produces
A. aerosol
B. trans fat
C. soap
D. mercaptans
C. soap
Wood charcoal is used for decoloration of sugar
because it the colored materials.
A. adsorbs
B. oxidizes
C. reduces
D. converts
A. adsorbs
Producer gas consists mainly of
A. CO, CO2, N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H2
A. CO, CO2, N2, H2
Neoprene is the trade name of
A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber
C. polychloroprene
Sulfur addition in soap is done to
A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.
B. cure pimples & dandruff.
Phosphate rock is a raw material for the
manufacture of
A. phosphoric acid
B. phosphorous
C. superphosphates
D. all of the above
D. all of the above
Mineral oils (e.g. petroleum oils) are preferred over
fatty oils (e.g. mustard oil, ghee, tallow, palm oil,
olive oil etc.) as a lubricant due to its
A. poor oxidation stability and high gum forming tendency.
B.greater tendency of decomposition at elevated
temperature.
C. hydrolysis tendency in presence of water.
D. all of the above
D. all of the above
Which of the following is NOT a raw material used
for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica
A. Iron oxide
Zeolite removes both temporary as well as permanent
hardness of water by precipitating calcium and
magnesium present in water as insoluble zeolites. Used
zeolite is regenerated by flushing with the solution of
A. calcium sulphate
B. sodium chloride
C. sodium sulphate
D. magnesium chloride
B. sodium chloride
Pasteurization of milk means
A. removal of fatty and albuminous substance from it.
B.killing of organisms present in it by heating it at
controlled temperature without changing its natural
characteristics.
C.inhibiting the growth of micro-organisms without
killing them.
D. none of these.
B.killing of organisms present in it by heating it at
controlled temperature without changing its natural
characteristics.
Fusion of bauxite and produces high
alumina cement.
A. alum
B. limestone
C. coke
D. quartz
B. limestone
_________ process is used for the manufacture
of sodium carbonate by ammonia soda process.
A. Ostwald’s
B. Bosch
C. Solvay
D. Haber’s
C. Solvay
Polycaprolactum is commercially known as
A. nylon-6
B. nylon-66
C. dacron
D. rayon
A. nylon-6
Frasch process is for
A. making oxygen
B. producing helium
C. mining sulfur
D. making nitrogen
C. mining sulfur
Pitch (a product of coal tar distillation) is always
mixed with creosote oil, when it is to be burnt in a
burner, because
A. its calorific value is very less.
B. tar neutralizes the residual acids present in pitch.
C.it reduces viscosity and imparts fluidity for its
transportation through pipelines at economic
pressure drop.
D. all of the above
C.it reduces viscosity and imparts fluidity for its
transportation through pipelines at economic
pressure drop.
Which is the main reducing agent during
production of iron from iron ore in a blast furnace?
A. C
B. CO
C. CO2
D. H2
B. CO
The drug used in contraceptives is
A. sulphadizene
B. mestranol
C. methyl salicylate
D. cholecalciferol
B. mestranol
Raw materials used for producing _____
cement does not contain iron oxide.
A. waterproof
B. slag
C. white
D. pozzolan
C. white
In the Lurgi coal gasifier
A. coking coals cannot be used.
B. low carbon conversion efficiency is achieved.
C. entrainment of solids is higher.
D. large quantity of coal can be processed.
D. large quantity of coal can be processed.
Neon gas is
A. flammable in nature.
B. used in color discharge tube.
C. filled in lamps having tungsten filament.
D. all (a), (b) and (c).
B. used in color discharge tube.
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
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
All enzymes are made of ___.
fats
carbohydrates
proteins
amino acids
proteins
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.
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
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
10
25
50
98
50
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
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).
Very fine suspended and colloidal impurities are removed from water by a process called
sedimentation
coagulation
disinfection
softening
coagulation
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.
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
Dehydrogenation of isopropanol produces
propyl alcohol
acetone
trichloroethylene
formaldehyde
acetone
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
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
Which of the following has sodium bicarbonate as its main constituent?
Baking soda
Baking powder
Washing soda
none of these
Baking powder
In primitive 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
a) cause cholesterol build up and blood clotting.
b) are prone to rancid oxidation.
always contain some amount of nickel (as their c) complete removal is very difficult).
d) have affinity to retain harmful sulphur compounds.
a) cause cholesterol build up and blood clotting.
Paper grade bamboo contains about __________ percent cellulose.
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
Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
high co-efficient of expansion.
high melting point.
both (b) and (c).
low co-efficient of expansion.
The process used for the manufacture of ethyl alcohol from molasses is
distillation
dehydration
dehydrogenation
none of these
none of these (fermentation)
__________ 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
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
alumina
silica gel
platinum
nickel
alumina
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
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
DDT should not be allowed to come in contact with iron (during its manufacture) to
a) avoid its decomposition.
b) prevent sulphonation of the
monochlorobenzene by the acid catalyst.
c) achieve non-hygroscopic property.
d) none of these.
a) avoid its decomposition.
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
oxidizing
disinfecting
none of these
oxidizing
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
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
a)bicarbonates & sulphates of calcium and magnesium.
b)undersirable taste and odour.
c)bacteria.
d)its corrosiveness.
a)bicarbonates & sulphates of calcium and magnesium.
Kaoline is a/an
refractory material
synthetic resin
artificial abrasive
blue pigment
refractory material
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
a) the number of grams of iodine taken up by 100 gm of oil or fat.
b) a measure of its unsaturation.
c) helpful in findings its adulteration & its suitability for making soap.
d) independent of the type of oil, whether it is drying or non-drying.
d) independent of the type of oil, whether it is drying or non-drying.
Nickel is not used as a catalyst in the
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
a) evaporation and burning the concentrate followed by causticisation of products.
b) multi-effect evaporation only.
c) selective liquid extraction.
d) extractive distillation.
a) evaporation and burning the concentrate followed by causticisation of products.
Varnish does not contain
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
furfural
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.
a) Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%.
b) Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%.
c) 75% oleum can be produced by distillation of 20% oleum.
d) Contact process of sulphuric acid manufacture uses nickel as the catalyst.
d) Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Pick out the wrong statement.
a) Catalytic hydrogenation of carbon monoxide produces methyl alcohol.
b) In nylon-6, the number 6 represents the total number of carbon atoms in the ring.
c) Raw materials for DDT manufacture are benzene and chlorine.
d) Ethanolamines are produced by using ammonia and ethylene oxide as raw material.
c) Raw materials for DDT manufacture are benzene and chlorine.
Molecular weights of polymers are in the range of
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
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.
a) Slow sand filters can remove colour completely.
b) Activated carbon can be used for taste & odour control without subsequent filtration.
c) Application of activated carbon reduces the temporary hardness of water.
d) Normally, the turbidity is removed by adding a coagulant prior to sedimentation.
d) Normally, the turbidity is removed by adding a coagulant 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
a) condensation product of hexam-ethylene diamine and adipic acid.
b) thermosetting material.
c) condensation product of dimethyl terephthalate and ethylene glycol.
d) none of these.
d) none of these.
Rancidity of the fatty oil can be reduced by its
decoloration
hydrogenation
oxidation
purification
hydrogenation
__________ 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.
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
a) gives higher conversion efficiency.
b) has a longer life and is not poisoned by arsenic.
c) handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant.
d) all (a), (b) and (c).
d) all (a), (b) and (c).
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
a) exchange of heat with colder stream.
b) adiabatic expansion through a throttle valve (Joule-Thomson expansion).
c) adiabatic expansion against a piston or in a turbine.
d) merely compressing the gas beyond its critical pressure.
b) adiabatic expansion through a throttle valve (Joule-Thomson expansion).
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
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.
a) Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively.
b) Protein catalysts are called enzymes.
c) The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes.
d) Total sugar content in molasses is about 10%.
d) Total sugar content in molasses is about 10%.
The major use of butadiene is
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
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
Production of alcohol by fermentation of molasses is an __________ process.
anaerobic
aerobic
endothermic
both(b) and (c)
aerobic
Main constituents of portland cement are calcium aluminate and
gypsum
silicates
sodium silicate
carbonates
silicates
Pick out the WRONG statement.
a) High early strength cement are made from materials having high silica to lime ratio.
b) The function of gypsum in cement is to enhance its initial setting rate.
c) Acid resistant cements are known as silicate cement.
d) Major component of greyish portland cement is tricalcium silicate.
a) High early strength cement are made from materials having high silica to lime ratio.
Common salt is generally not produced commonly by __________ method from brine.
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.
A) About 90% of nitric acid is manufactured by Ostwald’s process.
B) It is a strong mono basic acid which reacts with almost all the metals except noble metals.
C) Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2).
D) Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
D) Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Alcohol percentage in molasses may be around
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.
Which of the following is a disacchride ?
Sucrose
Glucose
Starch
Maltose
Sucrose
Comparing sulphate process with sulphite process, we find that __________ in the later.
A) both temperature & pressure in the former is less than that
B) both temperature & pressure in the former is more than that
C) temperature is more in the former whereas pressure is more
D) pressure is more in the former whereas temperature is less
B) both temperature & pressure in the former is more than that
Proximate analysis of coal determines its __________ content.
A) moisture, ash, sulphur & volatile matter
B) moisture & volatile matter
C) moisture, sulphur, nitrogen & fixed carbon
D) none of these
B) moisture & volatile matter
_________ 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.
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
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, sulphur, volatile matter & ash
The biochemical treatment applied to sewage effluents is a process of
dehydration
reduction
oxidation
polymerisation
oxidation
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
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.
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
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
A) decreases with decrease of thickness of the flakes.
B) increases with the increasing flake size keeping the flake thickness constant.
C) increases Considerably with the rise of temperature.
D) decreases as the moisture content of flakes increases.
D) decreases as the moisture content of flakes increases.
Sea weeds are an important source of
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
A) increasing the oxygen concentration.
B) putting more quantity of V2O5 catalyst in the converter.
C) removing some quantity of SO3 during intermediate stage.
D) maintaining low temperature & pressure in the converter.
C) removing some quantity of SO3 during intermediate stage.
Styrene is produced from ethyl benzene by the process of
dehydrogenation
oxidation
alkylation
dehydration
dehydrogenation
_________ is a polysacchride.
Maltose
Starch
Sucrose
Glucose
Starch
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
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
Hydrodenation of vegetable oils is a/an __________ reaction.
endothermic
autocatalytic
exothermic
homogenous
exothermic
Concentration of sulphide ores is done usually by
roasting
smelting
froth floatation
electro magnetic separation
froth floatation
Dacron is a/an
polyester
unsaturated polyster
polyamide
inorganic polymer
polyester
Sodium carbonate (soda ash) is not used in the manufacture of
fire extinguishers
sugar
baking powder
detergents
detergents
Viscose rayon
cannot be made from sulphite pulp.
utilises H2SO4, NaOH and CS2 during its manufacture.
cannot yield textile grade fibre.
none of these.
utilises H2SO4, NaOH and CS2 during its manufacture.
Nylon 6-6 is manufactured from
hexamethylene diamine and adipic acid.
hexamethylene diamine and maleic anhydride.
caprolactum.
dimethyl terephthalate and ethylene glycol.
hexamethylene diamine and adipic acid.
Glauber’s salt is chemically represented by
Na2SO4.10H2O
CaCl(OCl)
CaSO4.H2O
(NH4)2SO4
Na2SO4.10H2O
Chemical name of Grignard reagent is
sodium thiosulphate.
ethyl magnesium chloride.
sodium sulphite.
sodium bicarbonate.
ethyl magnesium chloride.
Which of the following processes is absent in glass manufacturing process ?
Sintering
Annealing
Shaping or forming
Melting
Sintering
Grignard reagent is chemically known as
ethyl magnesium chloride.
methyl magnesium chloride.
dichlorophenol.
monochloro acetic acid.
ethyl magnesium chloride.
The function of gypsum addition during cement making is to
increase the density of cement.
decrease the cement setting rate.
both (a) and (b).
neither (a) nor (b).
decrease the cement setting rate.
Low purity oxygen is used for
L.D. steel making.
cutting and welding of metals.
medicinal purposes.
chemical oxidation processes.
chemical oxidation processes.
_________ is produced using molasses as the starting raw material.
Methyl alcohol
Ethyl alcohol
Benzol
Dimethyl ether
Ethyl alcohol
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
high electrical insulation properties.
sharp melting points.
low co-efficient of thermal expansion.
compressive strength much greater than their tensile strengths.
sharp melting points.
A substance produced by a living organism and capable of anti-microbial activity is called a/an
antibiotic
antiseptic
disinfectant
none of these
antibiotic
Deaeration of water in its treatment is necessary, as it
minimises its turbidity.
helps in controlling its taste and odour.
minimises its corrosiveness.
none of these.
minimises its corrosiveness.
Hydrochloric acid is also known as
oil of vitriol
muriatic acid
strong organic acid
green acid
muriatic acid
Aryl benzene sulphonate (ABS) is a
detergent.
plasticiser for unsaturated polyester.
starting material for the synthesis of glycerine.
coating ingredient for photographic film.
detergent.
Adipic acid is an intermediate in the manufacture of
perspex
nylon-66
polystyrene
bakelite
nylon-66
Soaps remove dirt by
increasing the surface tension.
decreasing wettability.
supplying hydrophyllic group.
none of these.
none of these.
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
Xanthates
Stearic acid
Calcium & aluminium stearate
Formic acid
Calcium & aluminium stearate
Chemical name of soda ash is
sodium bicarbonate
sodium thiosulphate
potassium carbonate
none of these
none of these
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
mechanical
sulphate/kraft
sulphite
neutral sulphite semi-chemical
neutral sulphite semi-chemical
________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
Bauxite
Limestone
Quartz
Manganese
Limestone
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
tetrachloroethane
trichloroethane
tetrachloromethane
trichloromethane
trichloroethane
The basic difference between vegetable oils and fats is in their
density
chemical properties
physical state
composition
physical state
Which of the following is not a food additive?
Citric acid
Invertage
Benzoyl peroxide
Ammonium chloride
Ammonium chloride
Alum is commercially produced from
gypsum
feldspar
galena
bauxite
bauxite
CaO is called
quick lime
slaked lime
limestone
calcite
quick lime
Pick out the wrong statement.
A) Fibrillation of fibre during paper manufacture is done to develop the strength in paper.
B) Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number.
C) Bagasse fibre contains both lignin & cellulose.
D) Presence of sodium sulphate in pulp makes the pulp bleachability poor.
D) Presence of sodium sulphate in pulp makes the pulp bleachability poor.
Which of the following contains least amount of N2 ?
Coke oven gas
Blast furnace gas
Producer gas
Water gas (blue gas).
Coke oven gas
Calcination of limestone is not done in a __________ kiln for producing lime.
vertical shaft
rotary
fluidised bed
fixed bed
fixed bed
Neoprene is a
monomer
synthetic rubber
polyester
none of these
synthetic rubber
Saponification value/number of an oil or fat is a measure of its
fatty acid content.
degree of unsaturation of the fatty acids present in it.
average molecular weight.
insoluble fatty acid content.
average molecular weight.
Cement mainly contains
CaO, SiO2, Al2O3
MgO, SiO2, K2O
Al2O3, MgO, Fe2O3
CaO, MgO, K2O
CaO, SiO2, Al2O3
Sand and __________ is fused at 1300°C, to produce sodium silicate.
limestone
soda ash
coke
sodium sulphate
soda ash
Sucrose is a disaccharide consisting of
glucose and glucose
glucose and fructose
glucose and galactose
fructose and galactose
glucose and fructose
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
brighten the faint images.
remove metallic silver.
convert silver chloride to silver.
remove unexposed silver halide.
remove unexposed silver halide.
White phosphorous is stored under water, because
it does not react with water.
it is poisonous.
its kindling temperature in dry air is very low.
it is unstable.
its kindling temperature in dry air is very low.
_______ is not a constituent of gun powder.
Carbon
Charcoal
Sulphur
Potassium nitrate
Carbon
Hydrophilic group of a soap or detergent solution is
water hating
soil loving
water loving
none of these
water loving
Rotary kiln is not involved in the production of
cement
lime from limestone
slaked lime from quick lime
none of these
slaked lime from quick lime
Vanillin is a type of
anti-pyretic drug
food preservative
flavour
dye
flavour
Temporary hardness of water can be removed by
addition of alum (a coagulant).
boiling.
filtration (through gravity sand filter).
addition of lime.
boiling.
Pure rectified spirit contains about __________ percent alcohol.
45
70
95
99.5
95
Titanium dioxide is a/an __________ colour pigment.
white
black
yellow
blue
white
Essential oils are usually obtained using
steam distillation
extractive distillation
solvent extraction
leaching
leaching
Builders are added in soap to act as
cleaning power booster
anti-redeposition agent
corrosion inhibitor
fabric brightener
cleaning power booster
H2S is scrubbed from refinery gases by absorption using
dilute H2SO4
ethanol amine
chilled water
tri-butyl phosphate
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 Na+ ions
Oxidation of Cl- ions
Reduction of Na+ ions
Reduction of Cl- ions
Oxidation of Cl- ions
Zeolite is a/an
naturally occuring clay which is capable of exchanging cations.
abrasive material.
catalyst used in shift conversion.
none of these.
naturally occuring clay which is capable of exchanging cations.
Type of glass used in optical work is the __________ glass.
soda-lime
fibre
lead
borosilicate
lead
Pick out the wrong statement pertaining to the soap manufacture.
A) Transparent soaps are made by cold process.
B) Organic pigments are used as colouring materials in the soap manufacture.
C) Both laundary as well as toilet soaps are manufactured by hot process.
D) Colourless rosin is used in the manufacture of laundary soaps.
Transparent soaps are made by cold process.
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
Slag cement
Glasses
Porcelain/Potteries
Teflon
Teflon
Glass is
mainly CaO
subjected to galvanising
a super cooled liquid
all (a), (b) and (c)
a super cooled liquid
Analgesic drugs are
pain relievers
antibiotics
used in the treatment of T.B.
used in the treatment of typhiod
pain relievers
Commonly used glass is known as the __________ glass.
flint
hard
pyrex
soda
soda
Fusion of limestone and __________ produces high alumina cement.
sand
bauxite
quicklime
calcite
bauxite
Massacuits is a terminology used in the __________ industry.
paint
oil hydrogenation
soap
sugar
sugar
The basic constituent of vegetable oils is
triglyceride
fatty acids
fatty alcohol
mono esters
triglyceride
The most economical pulp for the production of newsprint would be the __________ pulp.
groundwood
sulphate
sulphite
semichemical
groundwood
_______ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Phosphates
Chromates
Sulphates
Bi-carbonates
Chromates
L.D. converter is used in the production of
pig iron
steel
copper
zinc
steel
The terminology ‘BTX’ used in coal tar distillation industry refers to
benzol-toluol-xylol.
benzol-toluene-xylene.
benzene-toluol-xylol.
benzene-toluene-xylene.
benzene-toluene-xylene.
Which of the following is not responsible for causing permanent hardness of water ?
Ca(HCO3)2
CaCl2
MgCl2
none of these
Ca(HCO3)2
Which of the following is not present in bagasse fibre ?
Cellulose
Lignin
Pentogens
None of these
None of these
Nitric acid is not used in the manufacture of
detergents
fertilisers
aqua regia
explosives.
detergents
Naphthols are derivates of
methyl amine
naphthalene
phenol
xylene
naphthalene
ermentation is adversely affected by the
presence of air.
absence of air.
high concentration.
presence of ammonium salts.
high concentration.
Dechlorination of treated water is necessary to
remove residual turbidity.
reduce the bacterial load on filter.
control taste and odour.
remove chlorinous taste.
remove chlorinous taste.
Fire clay is __________ refractory material.
a basic
an acidic
a neutral
not a
an acidic
An oil is converted into fat by its
hydrogenation
hydrolysis
hydrocracking
hydration
hydrogenation
Shaving soaps are
A) soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
B) metalic soaps compounded with frothing agents.
C) high free alkali soaps having excess of cane sugar and alcohol.
D) none of these
A) soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
Nylon-6 is a
polyamide
thermosetting resin
polyester
none of these
polyamide
The main product of high temperature carbonisation of coal is
coke
ammonia
tar
phenol
coke
_______ is a thermosetting plastic.
Polythene
Epoxy polymer
P.V.C.
Polystyrene
Epoxy polymer
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
(NH4)2SO4
NH4Cl
(NH4)2 NO3
liquid NH3
(NH4)2SO4
Flexible foam (for mattresses) is usually made of
PVC
silicone
polyurethanes
polyamides
polyurethanes
Glycerine is a by-product of the __________ industry.
soap
detergent
oil hydrogenation
paint
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.
remove the coloring matter from the syrup.
reduce the viscosity of the syrup.
improve the rate of crystallisation of sugar.
adjust the pH of the syrup.
Chalcopyrite is the main ore of
copper
lead
tin
iron
copper
The end bleaching agent used to move last traces of colour bodies from the pulp is
chlorine dioxide (ClO2)
MgO
SO2 gas
mercaptans
chlorine dioxide (ClO2)
Bio-degradable detergents
can be readily oxidised.
pose problem in sewerage plant.
have an isoparaffinic structure.
should not be used as it spoils the cloth.
can be readily oxidised.
Which allotrope of sulphur is insoluble in carbon disulphide ?
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphu
Plastic sulphur
Lubricating greases are a mixture of
mineral oil, soap and additives.
mineral oil and metallic soap.
mineral oil and fatty oil.
fatty oil and metallic soap.
mineral oil, soap and additives.
Metallic soap is __________ salt of fatty acids.
sodium
potassium
both sodium & potassium
aluminium or calcium
aluminium or calcium
Cation exchanger is regenerated usually with
NaOH
H2SO4
hydrazine
alum solution
H2SO4
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
A) SO3 gas is sparingly soluble in water.
B) water forms an acid mist, which is difficult to absorb.
C) the purity of acid is affected.
D) scale formation in the absorber is to be avoided.
B) water forms an acid mist, which is difficult to absorb.
The most widely used coagulant for removing suspended impurities from water is
bleaching powder
chlorine
calcium sulphate
alum
alum
Main constituent of limestone is
CaCO3
MgCO3
Na2CO3
CaSO4
CaCO3
________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate
Chlorine
Fat splitting catalyst is
CaCO3
ZnO
Al2O3
Fe
ZnO
Phthalic anhydride is used
in making PVC
as plasticisers
in insecticides manufacture
for making nylon-6
as plasticisers
Penicillin is separated from fermented broth by
extraction with amyl or butyl acetate.
ternery azeotropic distillation.
evaporation in calendria.
extractive distillation.
extraction with amyl or butyl acetate.
_____ process is used for producing soda ash.
Chamber
Chance
Tromp
Solvay
Solvay
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
slaked lime
soda lime
calcium perchlorate
none of these
slaked lime
_______ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
Silica/quartz
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
teflon
bakelite
polyester
nylon-66
bakelite
Main constituents of cotton fiber is
lignin
cellulose
starch
gelatine
cellulose
CaCl(OCl) is the chemical formula of
hypo
bleaching powder
plaster of paris
aqua regia
bleaching powder
Which is the most suitable dye for synthetic fibres ?
Acid dye
Azoic dye
Pigment dye
Mordant dye
Acid dye
Pick out the wrong statement.
A) Strongly caking coal should not be used in the Lurgi gasifier.
B) Acetylene gas can not be used for illumination purpose.
C) Water gas is called blue gas because of the color of the flame, when it is burnt.
D) Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels.
B) Acetylene gas can not be used for illumination purpose.
Hydrolysis of sugar is called
hydration
inversion
esterification
none of these
inversion
Sulphuric acid completely saturated with sulphur trioxide is called
concentrated sulphuric acid.
oleum.
sulphurous acid.
dilute sulphuric acid.
concentrated sulphuric acid.
Fish contains about __________ percent oil.
5
10
20
35
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.
remove lignin by way of crystallisation.
increase the cellulose content.
none of these.
avoid mechanical weakening of fibre.
Polymethyl methacrylate (PMMA) is known as
bakelite
teflon
perspex
nylon-6
perspex
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
chromium
arsenic
copper
mangnese
copper
Which of the following is an ore of iron ?
Galena
Chalcopyrite
Hematite
Bauxite
Hematite
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
NH3
NaCl
CaO
Coke
NH3
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
coke and sand
brine and coal
coke and caustic soda
none of these
brine and coal
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
NH3
NaCl
CaO
Coke
