Cupellation is used in the purification of

Question

Cupellation is used in the purification of

A. Lead

B. Tin

C. Silver

D. Gold

Correct Answer :

C. Silver

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Comment

Which of the following is an essential constituent of acids?

A. Oxygen

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Penicillin was discovered by

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Which of the following la a very good supporter of combustion?

B. Oxygen

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The compound or nitrogen used in dry cells is

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Heavy water was discovered by

C. Stas

D. Urey

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The poisonous nature of carbon monoxide is due to

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The simplest hydrocarbon is

C. ethane

D. butane

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Smelling salt contains

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Cholesterol is

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Gases have

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Which of the following metals is the best conductor of heat and electricity?

B. Silver

C. Copper

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Iron is rendered passive by

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Which of the following is a regenerated fibre?

B. Rayon

C. Nylon

D. Silk

Discuss this answer

Which of the following process involves removal of the elements of water?

Discuss this answer

Dust particles in the air of large industrial cities are removed by

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Rayon la made from

A. cotton

B. wool

D. silk

Discuss this answer

In the common soda-acid fire extinguisher, the fire is put out by

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The addition of a neutron to the nucleus of an atom

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In the making of jewels, gold is usually mixed with

A. zinc

B. tin

C. copper

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Rusting of iron cannot be prevented by

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Hydrogen gas has

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Dry Ice is

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Which of the following is used in fuel to propel rockets?

A. Petrol

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The scientist associated with the discovery of the nucleus was

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The chemical name of aspirin is

Discuss this answer

Hard water does not lather well with soap because

Discuss this answer

High temperature thermometers use

Discuss this answer

Triple Antigen treatment for children is to ward off

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The main constituent of gobar gas is

Discuss this answer

Which of the following is not a chemical change?

Discuss this answer

Answer 1

B. Nitrogen

Answer 2

C. Hydrogen

Answer 3

D. Chlorine

Answer 4

A. Alexander Fleming

Answer 5

B. Sir JJ Thomson

Answer 6

C. Dr Nessler

Answer 7

D. Sir John Russel

Answer 8

A. Carbon monoxide

Answer 9

C. Nitrogen

Answer 10

D. Hydrogen

Answer 11

A. ammonia

Answer 12

B. ammonium nitrate

Answer 13

C. ammonium chloride

Answer 14

D. ammonium nitrite

Answer 15

A. TW Richards

Answer 16

B. FW Aston

Answer 17

A. cutting off supply of oxygen

Answer 18

B. it™s being converted into carbon dioxide

Answer 19

C. its combination with haemoglobin of blood

Answer 20

D. its blocking of vocal chords

Answer 21

A. benzene

Answer 22

B. methane

Answer 23

A. ammonium chloride

Answer 24

B. ammonium carbonate

Answer 25

C. ammonium sulphate

Answer 26

D. potassium nitrate

Answer 27

A. a carbohydrate

Answer 28

B. a protein

Answer 29

C. a lipid

Answer 30

D. a hormone

Answer 31

A. a definite shape but not volume

Answer 32

B. a definite volume and shape

Answer 33

C. a definite volume but not shape

Answer 34

D. neither definite volume nor shape

Answer 35

A. Aluminium

Answer 36

D. Magnesium

Answer 37

A. conc. H2SO4

Answer 38

B. conc. HCl

Answer 39

C. conc. HNO3

Answer 40

D. acetic acid

Answer 41

A. Terylene

Answer 42

A. Hydrolysis

Answer 43

B. Hydrogenation

Answer 44

C. Dehydration

Answer 45

D. Dehydrogenation

Answer 46

A. Sedimentation

Answer 47

B. Electrophoresis

Answer 48

C. Tyndall effect

Answer 49

D. Brownian movement

Answer 50

C. cellulose

Answer 51

A. acid fumes

Answer 52

B. sodium bicarbonate

Answer 53

C. carbon dioxide

Answer 54

D. sodium carbonate

Answer 55

A. increases the atomic mass of the atom

Answer 56

B. decreases the atomic mass of the atom

Answer 57

C. increases the charge on the nucleus

Answer 58

D. decreases the charge on the nucleus

Answer 59

D. aluminium

Answer 60

A. painting

Answer 61

B. applying alkaline phosphate

Answer 62

C. applying soap water

Answer 63

D. galvanising

Answer 64

A. a very sweet smell

Answer 65

B. a very pungent smell

Answer 66

C. an irritating smell

Answer 67

D. no smell at all

Answer 68

A. solid carbon dioxide

Answer 69

B. liquid oxygen

Answer 70

C. liquid hydrogen

Answer 71

D. liquid. Chlorine

Answer 72

B. Kerosene

Answer 73

C. Hydrazine

Answer 74

D. Alcohol

Answer 75

A. Rutherford

Answer 76

B. Moseley

Answer 77

C. Niels Bohr

Answer 78

D. J.J. Thomson

Answer 79

A. acetamide phenol

Answer 80

B. malonyl urea

Answer 81

C. aminosalicylic acid

Answer 82

D. acetyl salicylic acid

Answer 83

A. it contains carbonates of calcium and magnesium

Answer 84

B. it contains sodium chloride

Answer 85

C. it is highly coloured

Answer 86

D. it contains suspended impurities

Answer 87

A. sodium amalgam

Answer 88

B. an alloy of sodium and potassium

Answer 89

C. silver amalgam

Answer 90

D. calcium amalgam

Answer 91

A. whooping cough

Answer 92

B. tetanus

Answer 93

C. diphtheria

Answer 94

D. All the three

Answer 95

A. methane

Answer 96

B. nitrogen

Answer 97

C. carbondioxide

Answer 98

D. ethylene

Answer 99

A. Rusting of iron

Answer 100

B. Burning of magnesium

Answer 101

C. Sublimation of iodine

Answer 102

D. Electrolysis of water

Cupellation is used in the purification of

Correct Answer :

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