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ChELE 2024 > IBX - CPI Sec. 13 to 14 > Flashcards

IBX - CPI Sec. 13 to 14 Flashcards

1
Q

Nylon-6 is a

polyamide
thermosetting resin
polyester
none of these

A

polyamide

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2
Q

Enzymes are

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

A

all (a), (b) and (c).

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3
Q

Multistage catalytic converter is not used in the

conversion of SO2 to SO3
NH3 synthesis reaction.
both (a) & (b).
neither (a) nor (b).

A

NH3 synthesis reaction.

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4
Q

The main product of high temperature carbonisation of coal is

coke
ammonia
tar
phenol

A

coke

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5
Q

__________ is a thermosetting plastic.

Polythene
Epoxy polymer
P.V.C.
Polystyrene

A

Epoxy polymer

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6
Q

Flexible foam (for mattresses) is usually made of

PVC
silicone
polyurethanes
polyamides

A

polyurethanes

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6
Q

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

(NH4)2SO4
NH4Cl
(NH4)2 NO3
liquid NH3

A

(NH4)2SO4

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7
Q

Glycerine is a by-product of the __________ industry.

soap
detergent
oil hydrogenation
paint

A

soap

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8
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

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.

A

adjust the pH of the syrup.

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9
Q

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).

A

all (a), (b), and (c).

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10
Q

Chalcopyrite is the main ore of

copper
lead
tin
iron

A

copper

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11
Q

The end bleaching agent used to move last traces of colour bodies from the pulp is

chlorine dioxide (ClO2)
MgO
SO2 gas
mercaptans

A

chlorine dioxide (ClO2)

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12
Q

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.

A

can be readily oxidised.

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13
Q

Sea water contains about __________ ppm of bromine.

5
70
500
1700

A

70

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14
Q

Which allotrope of sulphur is insoluble in carbon disulphide?

Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur

A

Plastic sulphur

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15
Q

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.

A

mineral oil, soap and additives.

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16
Q

Metallic soap is __________ salt of fatty acids.

sodium
potassium
both sodium & potassium
aluminium or calcium

A

aluminium or calcium

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17
Q

Cation exchanger is regenerated usually with

NaOH
H2SO4
hydrazine
alum solution

A

H2SO4

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18
Q

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.

A

water forms an acid mist, which is difficult to absorb.

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19
Q

Bitterns is a/an

unsaturated fat.
starting material for the production of iodine.
by-product of chlor-alkali industry.
none of these.

A

none of these.

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20
Q

The most widely used coagulant for removing suspended impurities from water is

bleaching powder
chlorine
calcium sulphate
alum

A

alum

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21
Q

__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.

Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate

A

Chlorine

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22
Q

Main constituent of limestone is

CaCO3
MgCO3
Na2CO3
CaSO4

A

CaCO3

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23
Q

Fat splitting catalyst is

CaCO3
ZnO
Al2O3
Fe

A

ZnO

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24
Q

Phthalic anhydride is used

in making PVC
as plasticisers
in insecticides manufacture
for making nylon-6

A

as plasticisers

25
Q

Penicillin is separated from fermented broth by

extraction with amyl or butyl acetate.
ternery azeotropic distillation.
evaporation in calendria.
extractive distillation.

A

extraction with amyl or butyl acetate.

26
Q

__________ process is used for producing soda ash.

Chamber
Chance
Tromp
Solvay

A

Solvay

27
Q

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

A

slaked lime

28
Q

Which of the following is an unsaturated fatty acid?

Lauric acid
Palmitic acid
Stearic acid
Oleic acid

A

Oleic acid

29
Q

The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

3
12
22
0.3

A

3

30
Q

__________ is used as a flux in the smelting of copper ore like chalcopyrite.

Coke breeze
Lime powder
Silica/quartz
Dolomite

A

Silica/quartz

31
Q

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

teflon
bakelite
polyester
nylon-66

A

bakelite

32
Q

Hydrogenation of oil does not

remove double bonds.
raise its melting point.
improve its resistance to oxidation.
none of these.

A

none of these.

33
Q

Main constituents of cotton fiber is

lignin
cellulose
starch
gelatine

A

cellulose

34
Q

CaCl(OCl) is the chemical formula of

hypo
bleaching powder
plaster of paris
aqua regia

A

bleaching powder

35
Q

Which is the most suitable dye for synthetic fibres?

Acid dye
Azoic dye
Pigment dye
Mordant dye

A

Acid dye

36
Q

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.

A

none of these.

37
Q

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.

A

Acetylene gas can not be used for illumination purpose.

38
Q

Hydrolysis of sugar is called

hydration
inversion
esterification
none of these

A

inversion

39
Q

Sulphuric acid completely saturated with sulphur trioxide is called

concentrated sulphuric acid.
oleum.
sulphurous acid.
dilute sulphuric acid.

A

concentrated sulphuric acid.

40
Q

Fish contains about __________ percent oil.

5
10
20
35

A

20

41
Q

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.

A

avoid mechanical weakening of fibre.

42
Q

Polymethyl methacrylate (PMMA) is known as

bakelite
teflon
perspex
nylon-6

A

perspex

43
Q

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

A

copper

44
Q

Percentage of alcohol in beer may be around __________ percent.

2-8
18-23
27-32
1-4

A

2-8

45
Q

Which of the following is an ore of iron?

Galena
Chalcopyrite
Hematite
Bauxite

A

Hematite

46
Q

Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?

NH3
NaCl
CaO
Coke

A

NH3

47
Q

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).

A

both (a) & (b).

48
Q

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

A

brine and coal

49
Q

Naphthalene is removed from coke oven gas by

adsorbing on palladium.
absorbing in ethanolamine.
scrubbing with wash oil.
passing it through electrostatic precipitator.

A

scrubbing with wash oil.

50
Q

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

A

1600

51
Q

Which of the following is not present in bagasse fibre?

Cellulose
Lignin
Pentogens
None of these

A

None of these

52
Q

Nitric acid is not used in the manufacture of

detergents
fertilisers
aqua regia
explosives.

A

detergents

53
Q

Naphthols are derivates of

methyl amine
naphthalene
phenol
xylene

A

naphthalene

54
Q

Fermentation is adversely affected by the

presence of air.
absence of air.
high concentration.
presence of ammonium salts.

A

high concentration.

55
Q

Extraction of __________ employs an electrolytic process.

aluminium
silver
copper
all (a), (b) and (c)

A

aluminium

56
Q

Dechlorination of treated water is necessary to

remove residual turbidity.
reduce the bacterial load on filter.
control taste and odour.
remove chlorinous taste.

A

remove chlorinous taste.

57
Q

Fire clay is __________ refractory material.

a basic
an acidic
a neutral
not a

A

an acidic

58
Q

An oil is converted into fat by its

hydrogenation
hydrolysis
hydrocracking
hydration

A

hydrogenation

59
Q

Production of one ton of cement requires about __________ tons of limestone.

0.6
1.2
2.2
3.8

A

1.2

60
Q

Low temperature carbonisation of coal takes place at __________ °C.

300
1100
700
900

A

700

61
Q

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

A

soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.

ChELE 2024 (17 decks)

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