Pollution Causes MCQ (Multiple Choice Questions) PDF Download

Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as

1. chloroflouro bicarbonates
2. chloroflourocarbides
3. chloroflourocarbonates
4. chlorofluorocarbon

Risks of skin cancer is increased if

1. more sun bathing is done
2. the chlorofluorocarbons are lowered
3. the greenhouse effect is lowered
4. more ultraviolet light penetrates the Earth

Upon entering through stomata, the leaves get damaged and plant dies. This pollutant is

1. carbon dioxide
2. lead
3. carbon monoxide
4. sulphur dioxide

Volcanic eruptions, biological decay and forest fires releases

1. Carbon monoxide in air
2. carbon dioxide in air
3. sulpher dioxide in air
4. ammonia in air

Increased melting of ice glaciers may be a result of

1. greenhouse effect
2. smog formation
3. sun getting closer to the Earth every year
4. moon moving away causing more tidal activities