General Chemistry

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106 Urea is a

A
Sodium fertilizer
B
Phosphatic fertilizer
C
Nitrogenous fertilizer
D
Potassium fertilizer

107 What is the element that is in the highest percentage in the composition of the earth ?

A
Silicon
B
Oxygen
C
Magnesium
D
Iron

108 Saccharin is made up of :

A
Toluene
B
Phenol
C
Propane
D
Butane

109 Which one of the following is not a fertilizer?

A
Ammonium sulphate
B
Calcium sulphate
C
Calcium ammonium nitrate
D
Potassium nitrate

11 The metallic constituents of hard water are :

A
Magnesium, calcium and tin
B
Iron, tin and calcium
C
Calcium, magnesium and iron
D
Magnesium, tin and iron

12 Which of the following is used as filler in tyre of rubber ?

A
Carbon black
B
Coal
C
Coke
D
Graphite

112 Which one of the following pairs is NOT correctly matched?

A
Haematite : Copper
B
Bauxite : Aluminium
C
Monazite : Thorium
D
Pitchblende : Uranium

113 Which of the following is used in making smoke bombs?

A
Sulphur
B
Phosphorus
C
Hydrogen
D
Carbon

114 Aspirin is :

A
Methoxy benzoic acid
B
Methyl Salicilate
C
Acetyl Salicilic acid
D
Phenyl Salicilate

115 Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ?

A
Iron and cadmium
B
Nickel and cadmium
C
Lead peroxide and lead
D
Zinc and carbon

116 Conversion of chemical energy into electrical energy occurs in :

A
Atomic bombs
B
Dynamo
C
A battery
D
Electric heaters

117 Catalyst is a substance which

A
increases the rate of the reaction
B
decreases the rate of reaction
C
has no action on the rate of the reaction
D
None of these

118 The gas used for filling weather balloons is :

A
helium
B
hydrogen
C
air
D
nitrogen

119 Milk is a natural

A
Solution
B
Emulsion
C
Mixture
D
Suspension

120 Impure camphor is purified by which of the following:

A
sublimation
B
fractional crystallisation
C
fractional distillation
D
steam distillation