IBX - CPI Sec. 13 to 14 Flashcards
Nylon-6 is a
polyamide
thermosetting resin
polyester
none of these
polyamide
Enzymes are
proteins with high molecular weight (around 10, 000).
derived from living organisms.
catalyst for temperature sensitive reactions.
all (a), (b) and (c).
all (a), (b) and (c).
Multistage catalytic converter is not used in the
conversion of SO2 to SO3
NH3 synthesis reaction.
both (a) & (b).
neither (a) nor (b).
NH3 synthesis reaction.
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
Flexible foam (for mattresses) is usually made of
PVC
silicone
polyurethanes
polyamides
polyurethanes
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
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.
Permanent hardness of water can be removed by
addition of soda ash to it.
treating it with zeolites.
passing it through sodium hexametaphosphate.
all (a), (b), and (c).
all (a), (b), and (c).
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.
Sea water contains about __________ ppm of bromine.
5
70
500
1700
70
Which allotrope of sulphur is insoluble in carbon disulphide?
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur
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
SO3 gas is sparingly soluble in water.
water forms an acid mist, which is difficult to absorb.
the purity of acid is affected.
scale formation in the absorber is to be avoided.
water forms an acid mist, which is difficult to absorb.
Bitterns is a/an
unsaturated fat.
starting material for the production of iodine.
by-product of chlor-alkali industry.
none of these.
none of these.
The most widely used coagulant for removing suspended impurities from water is
bleaching powder
chlorine
calcium sulphate
alum
alum
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate
Chlorine
Main constituent of limestone is
CaCO3
MgCO3
Na2CO3
CaSO4
CaCO3
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
Which of the following is an unsaturated fatty acid?
Lauric acid
Palmitic acid
Stearic acid
Oleic acid
Oleic acid
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
12
22
0.3
3
__________ 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
Hydrogenation of oil does not
remove double bonds.
raise its melting point.
improve its resistance to oxidation.
none of these.
none of these.
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.
Cold rubber (SBR) is superior as compared to hot rubber (SBR).
Polymerisation temperature can modify the properties of SBR.
Production of cold SBR employs lower pressure as compared to that of hot SBR.
none of these.
none of these.
Pick out the wrong statement.
Strongly caking coal should not be used in the Lurgi gasifier.
Acetylene gas can not be used for illumination purpose.
Water gas is called blue gas because of the color of the flame, when it is burnt.
Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels.
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
Percentage of alcohol in beer may be around __________ percent.
2-8
18-23
27-32
1-4
2-8
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
High purity nitrogen is used in
making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils.
fire fighting purposes.
both (a) & (b).
neither (a) nor (b).
both (a) & (b).
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
Naphthalene is removed from coke oven gas by
adsorbing on palladium.
absorbing in ethanolamine.
scrubbing with wash oil.
passing it through electrostatic precipitator.
scrubbing with wash oil.
The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.
800
1600
4000
8500
1600
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
Fermentation is adversely affected by the
presence of air.
absence of air.
high concentration.
presence of ammonium salts.
high concentration.
Extraction of __________ employs an electrolytic process.
aluminium
silver
copper
all (a), (b) and (c)
aluminium
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
Production of one ton of cement requires about __________ tons of limestone.
0.6
1.2
2.2
3.8
1.2
Low temperature carbonisation of coal takes place at __________ °C.
300
1100
700
900
700
Shaving soaps are
soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
metalic soaps compounded with frothing agents.
high free alkali soaps having excess of cane sugar and alcohol.
none of these
soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
