Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

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

IBX - CPI Sec. 13 to 14 Flashcards

(62 cards)

Start Studying
1
Q

Nylon-6 is a

polyamide
thermosetting resin
polyester
none of these

A

polyamide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The main product of high temperature carbonisation of coal is

coke
ammonia
tar
phenol

A

coke

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

__________ is a thermosetting plastic.

Polythene
Epoxy polymer
P.V.C.
Polystyrene

A

Epoxy polymer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Flexible foam (for mattresses) is usually made of

PVC
silicone
polyurethanes
polyamides

A

polyurethanes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Glycerine is a by-product of the __________ industry.

soap
detergent
oil hydrogenation
paint

A

soap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Chalcopyrite is the main ore of

copper
lead
tin
iron

A

copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Sea water contains about __________ ppm of bromine.

5
70
500
1700

A

70

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which allotrope of sulphur is insoluble in carbon disulphide?

Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur

A

Plastic sulphur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Metallic soap is __________ salt of fatty acids.

sodium
potassium
both sodium & potassium
aluminium or calcium

A

aluminium or calcium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Cation exchanger is regenerated usually with

NaOH
H2SO4
hydrazine
alum solution

A

H2SO4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

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

bleaching powder
chlorine
calcium sulphate
alum

A

alum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Main constituent of limestone is

CaCO3
MgCO3
Na2CO3
CaSO4

A

CaCO3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Fat splitting catalyst is

CaCO3
ZnO
Al2O3
Fe

A

ZnO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Phthalic anhydride is used in making PVC as plasticisers in insecticides manufacture for making nylon-6
as plasticisers
25
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.
26
__________ process is used for producing soda ash. Chamber Chance Tromp Solvay
Solvay
27
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
28
Which of the following is an unsaturated fatty acid? Lauric acid Palmitic acid Stearic acid Oleic acid
Oleic acid
29
The yield of tar from high temperature carbonisation of dry coal is about __________ percent. 3 12 22 0.3
3
30
__________ is used as a flux in the smelting of copper ore like chalcopyrite. Coke breeze Lime powder Silica/quartz Dolomite
Silica/quartz
31
Phenol formaldehyde is produced by condensation polymerisation. It is also known as teflon bakelite polyester nylon-66
bakelite
32
Hydrogenation of oil does not remove double bonds. raise its melting point. improve its resistance to oxidation. none of these.
none of these.
33
Main constituents of cotton fiber is lignin cellulose starch gelatine
cellulose
34
CaCl(OCl) is the chemical formula of hypo bleaching powder plaster of paris aqua regia
bleaching powder
35
Which is the most suitable dye for synthetic fibres? Acid dye Azoic dye Pigment dye Mordant dye
Acid dye
36
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.
37
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.
38
Hydrolysis of sugar is called hydration inversion esterification none of these
inversion
39
Sulphuric acid completely saturated with sulphur trioxide is called concentrated sulphuric acid. oleum. sulphurous acid. dilute sulphuric acid.
concentrated sulphuric acid.
40
Fish contains about __________ percent oil. 5 10 20 35
20
41
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.
42
Polymethyl methacrylate (PMMA) is known as bakelite teflon perspex nylon-6
perspex
43
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
44
Percentage of alcohol in beer may be around __________ percent. 2-8 18-23 27-32 1-4
2-8
45
Which of the following is an ore of iron? Galena Chalcopyrite Hematite Bauxite
Hematite
46
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process? NH3 NaCl CaO Coke
NH3
47
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).
48
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
49
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.
50
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
51
Which of the following is not present in bagasse fibre? Cellulose Lignin Pentogens None of these
None of these
52
Nitric acid is not used in the manufacture of detergents fertilisers aqua regia explosives.
detergents
53
Naphthols are derivates of methyl amine naphthalene phenol xylene
naphthalene
54
Fermentation is adversely affected by the presence of air. absence of air. high concentration. presence of ammonium salts.
high concentration.
55
Extraction of __________ employs an electrolytic process. aluminium silver copper all (a), (b) and (c)
aluminium
56
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.
57
Fire clay is __________ refractory material. a basic an acidic a neutral not a
an acidic
58
An oil is converted into fat by its hydrogenation hydrolysis hydrocracking hydration
hydrogenation
59
Production of one ton of cement requires about __________ tons of limestone. 0.6 1.2 2.2 3.8
1.2
60
Low temperature carbonisation of coal takes place at __________ °C. 300 1100 700 900
700
61
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.

ChELE 2024 (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions