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CPI > section 13 > Flashcards

section 13 Flashcards

1
Q

Nylon-6 is a
a. polyamide
b. thermosetting resin
c. polyester
d. none of these

A

a

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2
Q

Enzymes are
a. proteins with high molecular weight
(around 10, 000).
b. derived from living organisms.
c. catalyst for temperature sensitive reactions.
d. all (a), (b) and (c).

A

d

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3
Q

Multistage catalytic converter is not used in the
a. conversion of SO2 to SO3
b. NH3 synthesis reaction.
c. both (a) & (b).
d. neither (a) nor (b).

A

b

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4
Q

The main product of high temperature
carbonisation of coal is
a. coke
b. ammonia
c. tar
d. Phenol

A

a

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5
Q

__________ is a thermosetting plastic.
a. Polythene
b. Epoxy polymer
c. P.V.C.
d. Polystyrene

A

b

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6
Q

In an integrated steel plant, NH3 present in coke
oven gas is normally recovered as
a. (NH4)2SO4
b. NH4Cl
c. (NH4)2 NO3
d. liquid NH3

A

a

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7
Q

Flexible foam (for mattresses) is usually made of
a. PVC
b. silicone
c. polyurethanes
d. Polyamides

A

c

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8
Q

Glycerine is a by-product of the __________
industry.
a. soap
b. detergent
c. oil hydrogenation
d. Paint

A

a

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9
Q

One of the steps during refining of cane sugar
consists of addition of hydrated lime to the sugar
syrup followed by carbonation of the resulting
solution. The purpose of this step is to

a. adjust the pH of the syrup.
b. remove the coloring matter from the syrup.
c. reduce the viscosity of the syrup.
d. improve the rate of crystallisation of sugar.

A

a

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10
Q

Permanent hardness of water can be removed by
a. addition of soda ash to it.
b. treating it with zeolites.
c. passing it through sodium
hexametaphosphate.
d. all (a), (b), and (c).

A

d

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11
Q

Chalcopyrite is the main ore of
a. copper
b. lead
c. tin
d. Iron

A

a

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12
Q

The end bleaching agent used to move last
traces of colour bodies from the pulp is
a. chlorine dioxide (ClO2)
b. MgO
c. SO2 gas
d. Mercaptans

A

a

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13
Q

Bio-degradable detergents
a. can be readily oxidised.
b. pose problem in sewerage plant.
c. have an isoparaffinic structure.
d. should not be used as it spoils the cloth.

A

a

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14
Q

Sea water contains about __________ ppm of
bromine.
a. 5
b. 70
c. 500
d. 1700

A

b

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15
Q

Which allotrope of sulphur is insoluble in
carbon disulphide?
a. Rhombic sulphur
b. Monoclinic sulphur
c. Plastic sulphur
d. Milk of sulphur

A

c

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16
Q

Lubricating greases are a mixture of
a. mineral oil, soap and additives.
b. mineral oil and metallic soap.
c. mineral oil and fatty oil.
d. fatty oil and metallic soap.

A

a

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17
Q

Metallic soap is __________ salt of fatty acids.
a. sodium
b. potassium
c. both sodium & potassium
d. aluminium or calcium

A

d

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18
Q

Cation exchanger is regenerated usually with
a. NaOH
b. H2SO4
c. hydrazine
d. alum solution

A

b

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19
Q

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.

A

b

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20
Q

Bitterns is a/an
a. unsaturated fat.
b. starting material for the production of
iodine.
c. by-product of chlor-alkali industry.
d. none of these.

A

d

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21
Q

The most widely used coagulant for removing
suspended impurities from water is
a. bleaching powder
b. chlorine
c. calcium sulphate
d. Alum

A

d

22
Q

Main constituent of limestone is
a. CaCO3
b. MgCO3
c. Na2CO3
d. CaSO4

A

a

23
Q

__________ is obtained as a by-product in the
manufacture of sodium hydroxide using brine.
a. Chlorine
b. Ammonium chloride
c. Sodium carbonate
d. Sodium bi-carbonate

A

a

24
Q

Fat splitting catalyst is
a. CaCO3
b. ZnO
c. Al2O3
d. Fe

A

b

25
Q

Phthalic anhydride is used
a. in making PVC
b. as plasticisers
c. in insecticides manufacture
d. for making nylon-6

A

b

26
Q

Penicillin is separated from fermented broth by
a. extraction with amyl or butyl acetate.
b. ternery azeotropic distillation.
c. evaporation in calendria.
d. extractive distillation.

A

a

27
Q

__________ process is used for producing soda
ash.
a. Chamber
b. Chance
c. Tromp
d. Solvay

A

d

27
Q

Bleaching powder (chemically known as calcium chlorohypochlorite) is commercially
produced by the action of chlorine on
a. slaked lime
b. soda lime
c. calcium perchlorate
d. none of these

A

a

27
Q

Which of the following is an unsaturated fatty
acid?
a. Lauric acid
b. Palmitic acid
c. Stearic acid
d. Oleic acid

A

d

27
Q

The yield of tar from high temperature
carbonisation of dry coal is about __________
percent.
a. 3
b. 12
c. 22
d. 0.3

A

a

28
Q

__________ is used as a flux in the smelting of
copper ore like chalcopyrite.
a. Coke breeze
b. Lime powder
c. Silica/quartz
d. Dolomite

A

c

29
Q

Phenol formaldehyde is produced by
condensation polymerisation. It is also known as
a. teflon
b. bakelite
c. polyester
d. Nylon-66

A

b

30
Q

Hydrogenation of oil does not
a. remove double bonds.
b. raise its melting point.
c. improve its resistance to oxidation.
d. none of these.

A

d

31
Q

Main constituents of cotton fiber is
a. lignin
b. cellulose
c. starch
d. Gelatine

A

b

32
Q

CaCl(OCl) is the chemical formula of
a. hypo
b. bleaching powder
c. plaster of paris
d. aqua regia

A

b

33
Q

Which is the most suitable dye for synthetic
fibres?
a. Acid dye
b. Azoic dye
c. Pigment dye
d. Mordant dye

A

a

34
Q

Pick out the wrong statement.
a. Cold rubber (SBR) is superior as compared
to hot rubber (SBR).
b. Polymerisation temperature can modify the
properties of SBR.
c. Production of cold SBR employs lower
pressure as compared to that of hot SBR.
d. none of these.

A

d

35
Q

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.

A

b

36
Q

Hydrolysis of sugar is called
a. hydration
b. inversion
c. esterification
d. none of these

A

b

37
Q

Sulphuric acid completely saturated with
sulphur trioxide is called
a. concentrated sulphuric acid.
b. oleum.
c. sulphurous acid.
d. dilute sulphuric acid.

A

a

38
Q

Fish contains about __________ percent oil.
a. 5
b. 10
c. 20
d. 35

A

c

39
Q

The main aim behind cooling the digested chip
at the bottom portion of the digestor by injecting
cold black liquor is to
a. avoid mechanical weakening of fibre.
b. remove lignin by way of crystallisation.
c. increase the cellulose content.
d. none of these.

A

a

40
Q

Polymethyl methacrylate (PMMA) is known as
a. bakelite
b. teflon
c. perspex
d. Nylon-6

A

c

41
Q

Coloured glass is obtained by mixing of colored
salts. Addition of __________ oxide is done to
impart greenish blue color to the glass.
a. chromium
b. arsenic
c. copper
d. Mangnese

A

c

42
Q

Percentage of alcohol in beer may be around
__________ percent.
a. 2-8
b. 18-23
c. 27-32
d. 1-4

A

a

43
Q

Which of the following is an ore of iron?
a. Galena
b. Chalcopyrite
c. Hematite
d. Bauxite

A

c

44
Q

Which of the following may be viewed as a
catalyst in the manufacture of soda ash by Solvay
process?
a. NH3
b. NaCl
c. CaO
d. Coke

A

a

45
Q

High purity nitrogen is used in
a. making protective gas (95% N2 + 5% H2)
for annealing of cold rolled steel strip coils.
b. fire fighting purposes.
c. both (a) & (b).
d. neither (a) nor (b).

A

c

46
Q

Commercial production of soda ash by Solvay
process requires limestone, __________ as raw
materials.
a. coke and sand
b. brine and coal
c. coke and caustic soda
d. none of these

A

b

47
Q

Naphthalene is removed from coke oven gas by
a. adsorbing on palladium.
b. absorbing in ethanolamine.
c. scrubbing with wash oil.
d. passing it through electrostatic precipitator.

A

c

CPI (14 decks)

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