Atmosphere MCQs with Answers

Emission of Chlorofluorocarbons (CFCs) in the atmosphere destroys _?

• A.Ozone layer
• B.Nitrogen cycle
• C.Carbon cycle
• D.Water cycle

Air pollution is caused by ?

• A.Hydrocarbons
• B.Nitrogen
• C.Oxygen
• D.Carbon dioxide

Ozone present in the ozone layer of the atmosphere is important because

• A.It helps in the growth of plants by absorbing a large proportion of the sun's ultraviolet radiations
• B.It reflects harmful infrared radiations back into space, keeping the Earth cool
• C.It traps heat within the atmosphere and helps maintain the Earth's temperature
• D.It converts carbon dioxide into oxygen, replenishing the breathable air

Past Paper MCQ

What is causing the thinning of the ozone layer?

• A.Carbon dioxide
• B.Chlorofluorocarbons
• C.Sulfur dioxide
• D.Nitrogen oxides

Following are the constituent of polluted air cause of Acid rain except?

• A.Sulfur dioxide
• B.Nitrogen oxides
• C.Argon
• D.Carbon dioxide

Which of the following is not an air pollutant?

• A.CO
• B.SO₂
• C.N₂
• D.NO₂

The primary function of the ozone layer is ?

• A.To protect the Earth from harmful UV rays
• B.To regulate the Earth's temperature
• C.To produce oxygen for breathing
• D.To trap greenhouse gases

Which of the following gases is not a source of air pollution?

• A.Carbon monoxide (CO)
• B.Sulfur dioxide (SO₂)
• C.Nitrogen (N₂)
• D.Nitrogen dioxide (NO₂)

What is the major source of release of direct pollutants in air pollution?

• A.Industrial effluents
• B.Fuel
• C.Agricultural waste
• D.Sewage

Excessive heat from the Sun is prevented by ?

• A.Ozone (O₃)
• B.Carbon dioxide (CO₂)
• C.Nitrogen (N₂)
• D.Water vapor (H₂O)