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General Chemistry MCQ Question with Answer

General Chemistry MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 8
The function of nitrogen in air is

to make air a moderate supporter of combustion
to maintain the density of air constant
to prevent the hydrogen in air from exploding
to reduce the poisonous nature of ozone in air

Question No : 9
One method by which the components of air can be separated is

shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium

Question No : 10
The noble gas which is present in microscopic quantities in air is

xenon
krypton
argon
helium

Question No : 11
The most abundant noble gas present in air is

neon
argon
helium
krypton

Question No : 12
Which one of the following gases is extremely soluble in water?

Carbon dioxide
Ammonia
Chlorine
Hydrogen sulphide

Question No : 13
What is 'oxygen mixture'?

A mixture of potassium nitrate and carbon
A mixture of ammonium chloride and sodium nitrate
A mixture of potassium chlorate and manganese dioxide
A mixture of ammonium nitrate and charcoal

Question No : 14
A mixture of carbon monoxide and hydrogen is

coal gas
producer gas
water gas
gobar gas