The most reactive allotropic form of phosphorus is __________ phosphorus.

Question

The most reactive allotropic form of phosphorus is __________ phosphorus.

A. Red

B. Yellow

C. Violet

D. Black

Correct Answer :

B. Yellow

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Permanent hardness of water can be removed by

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Catalyst used in the hydrogenation of oil is

A. Nickel

C. Iron

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In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

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Pick out the wrong statement.

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__________ is used as a flux in the smelting of copper ore like chalcopyrite.

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Thermal pyrolysis of ethylene dichloride produces

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

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Bordeaux mixture is a/an

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The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

A. 3

B. 12

C. 22

D. 0.3

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Pick out the wrong statement.

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Catalytic oxidation-dehydrogenation of methyl alcohol produces

B. Phenol

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__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.

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Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

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The catalyst used in shift converter is

A. Nickel

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Caprolactam (a raw material for nylon-6 manufacture) is produced from

A. Phenol

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Which is the most suitable dye for synthetic fibres?

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Refractory bricks burnt at very high temperature have got

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Styrene is produced from ethyl benzene by the process of

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Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils

Discuss this answer

Fusion of bauxite and __________ produces high alumina cement.

A. Alum

C. Coke

D. Quartz

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Sulphuric acid completely saturated with sulphur trioxide is called

B. Oleum

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In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

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Hard water

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Nicotine is

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Gun powder uses

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Permanent hardness of water can be removed by

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

A. CaO

B. MnO₂

C. ZnO

D. FeS

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Fusion of limestone and __________ produces high alumina cement.

A. Sand

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Which of the following is an explosive?

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Which of the following is not produced commercially from sea water?

D. Iodine

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Answer 1

A. Addition of soda ash to it

Answer 2

B. Treating it with zeolites

Answer 3

C. Passing it through sodium hexametaphosphate

Answer 4

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

Answer 5

B. Platinum

Answer 6

D. Alumina

Answer 7

A. Diamine and the ring

Answer 8

B. Dibasic acid and the ring

Answer 9

C. Diamine and the dibasic acid

Answer 10

D. None of these

Answer 11

A. Cold rubber (SBR) is superior as compared to hot rubber (SBR)

Answer 12

B. Polymerisation temperature can modify the properties of SBR

Answer 13

C. Production of cold SBR employs lower pressure as compared to that of hot SBR

Answer 14

D. None of these

Answer 15

A. Coke breeze

Answer 16

B. Lime powder

Answer 17

C. Silica/quartz

Answer 18

D. Dolomite

Answer 19

A. Trichloroethylene

Answer 20

B. Vinyl chloride

Answer 21

C. Ethanol amine

Answer 22

D. Ethylene oxide

Answer 23

A. Sedimentation

Answer 24

B. Coagulation

Answer 25

C. Disinfection

Answer 26

D. Softening

Answer 27

A. Fertiliser

Answer 28

B. Inorganic fungicide

Answer 29

C. Insecticide

Answer 30

D. Explosive

Answer 31

A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol

Answer 32

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

Answer 33

C. Raw materials for DDT manufacture are benzene and chlorine

Answer 34

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

Answer 35

A. Formaldehyde

Answer 36

C. Acetone

Answer 37

D. Maleic anhydride

Answer 38

A. Oxidising

Answer 39

B. Reducing

Answer 40

C. Complex forming

Answer 41

D. Photochemical

Answer 42

A. As a lubricant

Answer 43

B. As a rust preventive

Answer 44

C. In hard water for cleaning of cloth

Answer 45

D. As a foam depressant in distillation column

Answer 46

B. Vanadium

Answer 47

C. Silica gel

Answer 48

D. Alumina

Answer 49

B. Naphthalene

Answer 50

C. Benzene

Answer 51

D. Pyridine

Answer 52

A. Acid dye

Answer 53

B. Azoic dye

Answer 54

C. Pigment dye

Answer 55

D. Mordant dye

Answer 56

A. Greater resistance to corrosion by slags

Answer 57

B. Less resistance to corrosion by slags

Answer 58

C. High spalling tendency

Answer 59

D. None of these

Answer 60

A. Dehydrogenation

Answer 61

B. Oxidation

Answer 62

C. Alkylation

Answer 63

D. Dehydration

Answer 64

A. Cause cholesterol build up and blood clotting

Answer 65

B. Are prone to rancid oxidation

Answer 66

C. Always contain some amount of nickel (as their complete removal is very difficult)

Answer 67

D. Have affinity to retain harmful sulphur compounds

Answer 68

B. Limestone

Answer 69

A. Concentrated sulphuric acid

Answer 70

C. Sulphurous acid

Answer 71

D. Dilute sulphuric acid

Answer 72

A. Sodium sulphide & sodium carbonate

Answer 73

B. Sodium sulphite & sodium carbonate

Answer 74

C. Sodium sulphite & sodium sulphide

Answer 75

D. None of these

Answer 76

A. Does not affect the lather formation by soap

Answer 77

B. Is not unfit for drinking purpose

Answer 78

C. Pollutes the water stream

Answer 79

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

Answer 80

A. A volatile alkaloid

Answer 81

B. Obtained by treating by-products of the tobacco processing industry

Answer 82

C. Both (A) and (B)

Answer 83

D. Neither (A) nor (B)

Answer 84

A. Sulphur

Answer 85

B. Charcoal

Answer 86

C. Potassium nitrate

Answer 87

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

Answer 88

A. Boiling

Answer 89

B. Adding Ca(OH)₂

Answer 90

C. Boiling it with Na₂CO₃

Answer 91

D. None of these

Answer 92

B. Bauxite

Answer 93

C. Quicklime

Answer 94

D. Calcite

Answer 95

A. Nitro-glycerine

Answer 96

B. Trinitrotoluene (TNT)

Answer 97

C. Cellulose nitrate

Answer 98

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

Answer 99

A. Magnesium & potassium compounds

Answer 100

B. Common salt

Answer 101

C. Bromine

The most reactive allotropic form of phosphorus is __________ phosphorus.

Correct Answer :

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