The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

Question

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

B. Oleum

Correct Answer :

B. Oleum

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__________ paper is used in the manufacture of newsprint paper.

B. Board

C. Tissue

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Graphite is a/an

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Lime and soda ash are added to water to remove

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Styrene is produced from ethyl benzene by the process of

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Systemic insecticides

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Which of the following paper does not require a filler during manufacture?

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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?

Discuss this answer

Which of the following is an explosive?

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Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

A. -83

B. -183

C. -196

D. -218

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Styrene is produced from ethyl benzene by the process of

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Concentration of hydrogen peroxide is done by

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Which of the following, when pyrolysed, produces Perchloroethylene?

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Pick out the true statement pertaining to water treatment.

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Litharge is

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Pick out the wrong statement.

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Addition of calcium oxide to water produces

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Saponification number of an oil or fat

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__________ is an ore concentrating metallurgical process involving a chemical change.

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Very fine suspended and colloidal impurities are removed from water by a process called

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Starting material for the commercial production of ethyl alcohol in India is

A. Rice

D. Maize

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Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

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Reaction of calcium carbide with water produces a gas, which is used

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Enzymes are organic catalysts used in the __________ reactions.

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Yellow glycerine is made into white, using

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Linde process of gas liquefaction employs

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Lindane is

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Pick out the wrong statement.

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Permanent hardness of water can be removed by

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Conversion of CO to CO2 by steam in presence of a catalyst is called

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Salt cake is chemically represented by

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Answer 1

A. Dilute H₂SO₄

Answer 2

C. Ultraviolet light

Answer 3

D. None of these

Answer 4

A. Ground-wood

Answer 5

D. Wrapping

Answer 6

A. Electrical insulator

Answer 7

B. Allotrope of carbon

Answer 8

C. Moderator used in nuclear reactor

Answer 9

D. Both (B) and (C)

Answer 10

A. Bicarbonates & sulphates of calcium and magnesium

Answer 11

B. Undesirable taste and odour

Answer 12

C. Bacteria

Answer 13

D. Its corrosiveness

Answer 14

A. Dehydrogenation

Answer 15

B. Oxidation

Answer 16

C. Alkylation

Answer 17

D. Dehydration

Answer 18

A. Are absorbed throughout the plant

Answer 19

B. Kill insects following external bodily contact

Answer 20

C. Are stomach poisons

Answer 21

D. Emit poisonous vapour

Answer 22

A. Bond paper

Answer 23

B. Writing paper

Answer 24

C. Blotting paper

Answer 25

D. Coloured paper

Answer 26

A. Oxidation of Na⁺ ions

Answer 27

B. Oxidation of Cl^- ions

Answer 28

C. Reduction of Na⁺ ions

Answer 29

D. Reduction of Cl^- ions

Answer 30

A. Nitro-glycerine

Answer 31

B. Trinitrotoluene (TNT)

Answer 32

C. Cellulose nitrate

Answer 33

D. All (A), (B), and (C)

Answer 34

A. Dehydrogenation

Answer 35

B. Oxidation

Answer 36

C. Alkylation

Answer 37

D. Dehydration

Answer 38

A. Crystallisation

Answer 39

B. Vacuum crystallisation

Answer 40

C. Atmospheric distillation

Answer 41

D. Dehydration

Answer 42

A. Ethylene dichloride

Answer 43

B. Chlorobenzene

Answer 44

C. Carbon tetrachloride

Answer 45

D. Chlorinated paraffin

Answer 46

A. Slow sand filters can remove colour completely

Answer 47

B. Activated carbon can be used for taste & odour control without subsequent filtration

Answer 48

C. Application of activated carbon reduces the temporary hardness of water

Answer 49

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Answer 50

A. Lead oxide

Answer 51

B. Zinc oxide

Answer 52

C. Zinc sulphide

Answer 53

D. Cellulosic photographic material

Answer 54

A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper

Answer 55

B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number

Answer 56

C. Bagasse fibre contains both lignin & cellulose

Answer 57

D. Presence of sodium sulphate in pulp makes the pulp bleachability poor

Answer 58

A. Exothermic heat

Answer 59

B. Hissing sound

Answer 60

C. Slaked lime

Answer 61

D. All (A), (B) & (C)

Answer 62

A. Gives an idea about its molecular weight

Answer 63

B. Is inversely proportional to its molecular weight

Answer 64

C. Detects its adulteration

Answer 65

D. All (A), (B) & (C)

Answer 66

A. Electromagnetic separation

Answer 67

B. Froth floatation

Answer 68

C. Roasting

Answer 69

D. None of these

Answer 70

A. Sedimentation

Answer 71

B. Coagulation

Answer 72

C. Disinfection

Answer 73

D. Softening

Answer 74

B. Molasses

Answer 75

C. Fruit of Mahua tree

Answer 76

A. 1 atm & 100°C

Answer 77

B. 5 atm & 275°C

Answer 78

C. 100 atm & 500°C

Answer 79

D. 50 atm & 1000°C

Answer 80

A. As an illuminant

Answer 81

B. For metal cutting/welding

Answer 82

C. Both (A) & (B)

Answer 83

D. Neither (A) nor (B)

Answer 84

A. Chemical

Answer 85

B. Biochemical

Answer 86

C. Photochemical

Answer 87

D. Electrochemical

Answer 88

A. Activated carbon

Answer 89

B. Diatomaceous earth

Answer 90

C. Bauxite

Answer 91

D. Bentonite

Answer 92

A. Exchange of heat with colder stream

Answer 93

B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

Answer 94

C. Adiabatic expansion against a piston or in a turbine

Answer 95

D. Merely compressing the gas beyond its critical pressure

Answer 96

A. Not a fumigant

Answer 97

B. BHC (Benzene Hexachloride) containing 99% γ-isomer

Answer 98

C. A by-product of BHC manufacture

Answer 99

D. Both (B) and (C)

Answer 100

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

Answer 101

B. Soap powder is prepared by mixing soap with hydrated sodium carbonate

Answer 102

C. Detergents differ from soaps in their action in hard water

Answer 103

D. Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Answer 104

A. Boiling

Answer 105

B. Adding Ca(OH)₂

Answer 106

C. Boiling it with Na₂CO₃

Answer 107

D. None of these

Answer 108

A. Steam reforming

Answer 109

B. Shift conversion

Answer 110

C. Steam gasification

Answer 111

D. None of these

Answer 112

A. Na₂SO₄

Answer 113

B. CaSO₄. ½H₂O

Answer 114

C. MgSO₄

Answer 115

D. BaSO₄

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

Correct Answer :

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