Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

Question

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

A. CaO

B. MnO₂

C. ZnO

D. FeS

Correct Answer :

C. ZnO

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Sulphur addition in soap is done to

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Superior quality laboratory apparatus is made of the __________ glass having low thermal coefficient of expansion & high chemical resistance.

A. Flint

B. Soda

C. Pyrex

D. Potash

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Shrinkage volume in cement setting does not depend upon the

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Acrylonitrile is mainly used in the __________ industry.

C. Dyeing

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The function of gypsum addition during cement making is to

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Mannheim furnace is used in the manufacture of

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Flash point of most vegetable oils is about __________ °C.

A. 50

B. 100

C. 200

D. 300

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Bio-degradable detergents

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Main product in calcium carbide-water reaction is

C. CO₂

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In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

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Dense soda ash used in the manufacture of glass, is chemically represented by

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__________ process is used for producing soda ash.

B. Chance

C. Tromp

D. Solvay

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Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

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Oxygen is produced by fractionation of air using __________ process.

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Nylon-66 is so named because the

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Solvent used for extraction of oil is

A. Hexane

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Which of the following is not an insecticide?

D. Hexane

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Sand and __________ is fused at 1300°C, to produce sodium silicate.

C. Coke

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Cation exchanger is regenerated usually with

A. NaOH

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Which of the following processes is absent in glass manufacturing process?

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Cement mainly contains

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Pick out the wrong statement.

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Fatty material used in soap making is

C. Tallow

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90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

A. < 0

B. 10-30

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Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.

A. 25

B. 60-70

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With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

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Phthalic anhydride is produced by the oxidation of

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Which of the following is not a product of coal tar distillation?

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Fermentation is adversely affected by the

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Concentration of hydrogen peroxide is done by

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Answer 1

A. Improve the soap texture

Answer 2

B. Cure pimples & dandruff

Answer 3

C. Fasten lather formation

Answer 4

D. Increase its cleansing action

Answer 5

A. Sand to cement ratio

Answer 6

B. Water to cement ratio

Answer 7

C. Ambient temperature fluctuation

Answer 8

D. Drying period

Answer 9

A. Polymer

Answer 10

B. Printing

Answer 11

D. Photographic

Answer 12

A. Increase the density of cement

Answer 13

B. Decrease the cement setting rate

Answer 14

C. Both (A) and (B)

Answer 15

D. Neither (A) nor (B)

Answer 16

A. Hydrochloric acid

Answer 17

B. H₂SO₄ by Chamber process

Answer 18

C. Calcium carbide

Answer 19

D. Corundum

Answer 20

A. Can be readily oxidised

Answer 21

B. Pose problem in sewerage plant

Answer 22

C. Have an isoparaffinic structure

Answer 23

D. Should not be used as it spoils the cloth

Answer 24

A. Ca(OH)₂

Answer 25

B. C₂H₂

Answer 26

D. CaCO₃

Answer 27

A. Furnace → converter → absorber

Answer 28

B. Furnace → evaporator → absorber

Answer 29

C. Furnace → converter → evaporator

Answer 30

D. Converter → furnace → absorber

Answer 31

A. Na₂CO₃

Answer 32

B. Na₂CO₃.10H₂O

Answer 33

C. Na₂CO₃.H₂O

Answer 34

D. Na₂HCO₃

Answer 35

A. Chamber

Answer 36

A. High cost of mercury

Answer 37

B. High specific gravity of mercury

Answer 38

C. Non-availability of high purity mercury

Answer 39

D. Pollution of water stream by mercury

Answer 40

A. Linde's

Answer 41

B. Claude's

Answer 42

C. Either (A) or (B)

Answer 43

D. None of these

Answer 44

A. Average degree of polymerisation of the polymer is 1966

Answer 45

B. Number of carbon atoms between two nitrogen atoms are 6

Answer 46

C. Number of nitrogen atoms between two carbon atoms are 6

Answer 47

D. Polymer was first synthesised in 1966

Answer 48

B. Methyl ethyl ketone

Answer 49

C. Furfural

Answer 50

D. None of these

Answer 51

A. Hydrocyanic acid

Answer 52

B. Nicotine

Answer 53

C. Sodium fluoride

Answer 54

A. Limestone

Answer 55

B. Soda ash

Answer 56

D. Sodium sulphate

Answer 57

B. H₂SO₄

Answer 58

C. Hydrazine

Answer 59

D. Alum solution

Answer 60

A. Sintering

Answer 61

B. Annealing

Answer 62

C. Shaping or forming

Answer 63

D. Melting

Answer 64

A. CaO, SiO₂, Al₂O₃

Answer 65

B. MgO, SiO₂, K₂O

Answer 66

C. Al₂O₃, MgO, Fe₂O₃

Answer 67

D. CaO, MgO, K₂O

Answer 68

A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol

Answer 69

B. In nylon-6, the number 6 represents the total number of carbon atoms in the ring

Answer 70

C. Raw materials for DDT manufacture are benzene and chlorine

Answer 71

D. Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Answer 72

A. Fatty acid

Answer 73

B. Fatty alcohols

Answer 74

D. Detergents

Answer 75

C. 250-280

Answer 76

D. 500-600

Answer 77

C. 150-200

Answer 78

D. 250-300

Answer 79

A. Increases

Answer 80

B. Increases linearly

Answer 81

C. Decreases

Answer 82

D. Decreases linearly

Answer 83

A. Naphthalene

Answer 84

B. Benzene

Answer 85

C. Toluene

Answer 86

D. Aniline

Answer 87

A. Anthracene

Answer 88

B. Creosote oil

Answer 89

C. Carbolic oil

Answer 90

D. None of these

Answer 91

A. Presence of air

Answer 92

B. Absence of air

Answer 93

C. High concentration

Answer 94

D. Presence of ammonium salts

Answer 95

A. Crystallisation

Answer 96

B. Vacuum crystallisation

Answer 97

C. Atmospheric distillation

Answer 98

D. Dehydration

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

Correct Answer :

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Related Questions

Sulphur addition in soap is done to

Superior quality laboratory apparatus is made of the __________ glass having low thermal coefficient of expansion & high chemical resistance.

Shrinkage volume in cement setting does not depend upon the

Acrylonitrile is mainly used in the __________ industry.

The function of gypsum addition during cement making is to

Mannheim furnace is used in the manufacture of

Flash point of most vegetable oils is about __________ °C.

Bio-degradable detergents

Main product in calcium carbide-water reaction is

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

Dense soda ash used in the manufacture of glass, is chemically represented by

__________ process is used for producing soda ash.

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

Oxygen is produced by fractionation of air using __________ process.

Nylon-66 is so named because the

Solvent used for extraction of oil is

Which of the following is not an insecticide?

Sand and __________ is fused at 1300°C, to produce sodium silicate.

Cation exchanger is regenerated usually with

Which of the following processes is absent in glass manufacturing process?

Cement mainly contains

Pick out the wrong statement.

Fatty material used in soap making is

90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

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