Chemistry MCQs

Question 1

Particulates (< 1 μm size) remaining suspended in air indefinitely and transported by wind currents are called

Accepted Answer

Aerosols

Answer

Mists

Answer

Fumes

Answer

Smoke

Question 2

Mercury is emitted into air by

Accepted Answer

Burning garbage

Answer

Burning coal

Answer

Coal fire

Answer

Steam engine

Question 3

'Acid rain' is caused due to air pollution by

Accepted Answer

Nitrous oxide and sulphur dioxide

Answer

Carbon dioxide

Answer

Carbon monoxide

Answer

Methane

Question 4

Gas released during Bhopal tragedy was :

Accepted Answer

Methyl isocyanate

Answer

Sodium isothiocyanate

Answer

Potassium isothiocyanate

Answer

Ethyl isocyanate

Question 5

The filter over which sewage is sprinkled is called as

Accepted Answer

Trickling filter

Answer

Percolating filter

Answer

Contact bed

Answer

Intermittent sand filter

Question 6

Main source of lead pollution is from

Accepted Answer

Leaded gasoline

Answer

Sewage

Answer

Tobacco

Answer

Insecticides

Question 7

An example of major air pollutant is

Accepted Answer

Carbon monoxide

Answer

Oxygen

Answer

Helium

Answer

Carbon dioxide

Question 8

Which type of radiations are absorbed by the upper layer of the atmosphere?

Accepted Answer

Ultraviolet

Answer

Radio-waves

Answer

Infrared

Answer

Visible

Question 9

Sulphur dioxide level in the atmosphere can be reduced by using

Accepted Answer

Low - sulphur fuels

Answer

More efficient car engines

Answer

Catalytic converters in industry

Answer

Static electricity to attract it in factory chimneys