__________ is an ore of lead.

Question

__________ is an ore of lead.

A. Quartz

B. Galena

Correct Answer :

B. Galena

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Digestion of wood-base materials (for manufacture of pulp) is done to

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Na2CO3 is called

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Use of chlorine in the treatment of sewage

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Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.

A. -53

B. -103

C. -183

D. -196

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Fish contains about __________ percent oil.

A. 5

B. 10

C. 20

D. 35

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Highly porous refractory bricks are

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Chemical name of Grignard reagent is

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Which of the following is not an abrasive material?

B. Pumice

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Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

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Styrene is produced from ethyl benzene by the process of

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Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

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Pick out the wrong statement.

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Producer gas consists mainly of

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Permanent hardness of water can be removed by

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The major constituent of black liquor generated during paper manufacture is sodium

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A mineral is termed as 'ore', if

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Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

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Nylon-66 is so named because the

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Hydrazine is largely used

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Absorption of SO3 in 97% H2SO4 is

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Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

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Coagulant is used __________ filtration.

A. Before

B. After

C. During

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In the Solvay process, the product from the calciner is

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Glycerine is not used in the

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__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.

C. Quartz

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Nitrogen is an essential component of

C. Fats

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Penicillin is separated from fermented broth by

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Coke used for the production of calcium carbide should have

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The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

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Economics of 'Solvay Process' depends upon the efficiency of

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Answer 1

C. Siderite

Answer 2

D. Chalcopyrite

Answer 3

A. Remove lignin

Answer 4

B. Produce long fibres

Answer 5

C. Prevent deterioration on storage

Answer 6

D. None of these

Answer 7

A. Washing soda

Answer 8

B. Soda ash

Answer 9

C. Plaster of Paris

Answer 10

D. Calcite

Answer 11

A. Helps in grease separation

Answer 12

B. Increases the biological oxygen demand (BOD)

Answer 13

C. Causes bulking of activated sludge

Answer 14

D. Aids in flocculation

Answer 15

A. Less susceptible to chemical attack by molten fluxes and gases etc

Answer 16

B. Very strong

Answer 17

C. Having very high thermal conductivity

Answer 18

D. None of these

Answer 19

A. Sodium thiosulphate

Answer 20

B. Ethyl magnesium chloride

Answer 21

C. Sodium sulphite

Answer 22

D. Sodium bicarbonate

Answer 23

A. Bakelite

Answer 24

C. Corundum

Answer 25

D. Carborundum

Answer 26

A. 7-14 and 14-30

Answer 27

B. 7-14 and 40-50

Answer 28

C. 14 - 30 and 40-50

Answer 29

D. 10 - 20 and 40 - 50

Answer 30

A. Dehydrogenation

Answer 31

B. Oxidation

Answer 32

C. Alkylation

Answer 33

D. Dehydration

Answer 34

A. Cutting

Answer 35

B. Fibrillation

Answer 36

C. Hydration

Answer 37

D. Strengthening

Answer 38

A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction

Answer 39

B. Chloral is obtained by the chlorination of ethyl alcohol

Answer 40

C. Insecticides acting on the insects through the respiratory system are called fumigants

Answer 41

D. Benzene hexachloride is not a contact insecticide

Answer 42

A. CO, CO₂ N₂, H₂

Answer 43

B. CO, H₂

Answer 44

C. H₂, CH₄

Answer 45

D. C₂H₂, CO₂, H₂

Answer 46

A. Boiling

Answer 47

B. Adding Ca(OH)₂

Answer 48

C. Boiling it with Na₂CO₃

Answer 49

D. None of these

Answer 50

A. Sulphate

Answer 51

B. Carbonate

Answer 52

C. Hydroxide

Answer 53

D. Bi-carbonate

Answer 54

A. A metal can be economically extracted from it

Answer 55

B. It contains ≥ 40% metal

Answer 56

C. The metal present in it is costly

Answer 57

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

Answer 58

A. 4 kgf/cm² & 500°C

Answer 59

B. 10 kgf/cm² & 1000°C

Answer 60

C. 40 kg/cm² & 200°C

Answer 61

D. 100 kgf/cm² & 500°C

Answer 62

A. Average degree of polymerisation of the polymer is 1966

Answer 63

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

Answer 64

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

Answer 65

D. Polymer was first synthesised in 1966

Answer 66

A. As a starting material for 'hypo'

Answer 67

B. In photographic industry

Answer 68

C. As rocket fuel

Answer 69

D. In printing industry

Answer 70

A. Exothermic

Answer 71

B. Endothermic

Answer 72

C. Not possible

Answer 73

D. None of these

Answer 74

A. Surfactant

Answer 75

B. Builder

Answer 76

C. Optical brightening agent

Answer 77

D. Anti soil redeposition agent

Answer 78

D. To avoid

Answer 79

A. Light soda ash

Answer 80

B. Dense soda ash

Answer 81

C. Sodium bicarbonate

Answer 82

D. Dehydrated soda ash

Answer 83

A. Manufacture of explosive

Answer 84

B. Conditioning and humidification of tobacco

Answer 85

C. Manufacture of pharmaceuticals

Answer 86

D. None of these

Answer 87

A. Bauxite

Answer 88

B. Limestone

Answer 89

D. Manganese

Answer 90

A. Mineral salts

Answer 91

B. Carbohydrates

Answer 92

D. Proteins

Answer 93

A. Extraction with amyl or butyl acetate

Answer 94

B. Ternary Azeotropic distillation

Answer 95

C. Evaporator in calandria

Answer 96

D. Extractive distillation

Answer 97

A. Low ash content

Answer 98

B. Low ignition temperature

Answer 99

C. High electrical resistivity

Answer 100

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

Answer 101

A. Avoid mechanical weakening of fibre

Answer 102

B. Remove lignin by way of crystallisation

Answer 103

C. Increase the cellulose content

Answer 104

D. None of these

Answer 105

A. Carbonating tower

Answer 106

B. Ammonia recovery

Answer 107

C. Ammonia recovery and size of the plant

Answer 108

D. Ammoniation of salt solution

__________ is an ore of lead.

Correct Answer :

Show all Chemical Process MCQ

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Highly porous refractory bricks are

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