Chemistry MCQs

Question 1

The natural resource, known as black gold is

Accepted Answer

Coal

Answer

Lead

Answer

Tin

Answer

Platinum

Question 2

The chief constituent of natural gas is:

Accepted Answer

Methane

Answer

Helium

Answer

Nitrogen

Answer

Propane

Question 3

The resources which can be used continuously, year-after-year are called

Accepted Answer

Renewable

Answer

Biotic

Answer

Abiotic

Answer

Non-renewable

Question 4

The highest volume of gases in lower atmosphere is comprised of

Accepted Answer

Nitrogen

Answer

Hydrogen

Answer

Carbon dioxide

Answer

Oxygen

Question 5

What is the maximum Water Vapour content in the atmosphere?

Accepted Answer

3 to 4 per cent

Answer

2 to 3 per cent

Answer

4 to 5 per cent

Answer

5 to 6 per cent

Question 6

Which of the process is known as nitrification?

Accepted Answer

Conversion of ammonia to nitrites

Answer

Reaction of Nitrogen Monoxide with oxygen to form nitric acid

Answer

Reaction of nitrogen dioxide with water to form nitric acid

Answer

Conversion of nitrite to nitric oxide

Question 7

Which is not a green house gas ?

Accepted Answer

N2O

Answer

CO2

Answer

CH4

Answer

Chlorofluorocarbons

Question 8

Formation of ozone hole is maximum over

Accepted Answer

Antarctica

Answer

Africa

Answer

India

Answer

Europe

Question 9

Ozone saves the biosphere by absorbing high energy radiations called ________ .

Accepted Answer

Ultraviolet rays (UV)

Answer

Infra-red (IR)

Answer

Gamma rays

Answer

X–rays