MCQ on Class 8 Pollution of air and water

1. Fuels that are incompletely combusted produce …………. gas.

•     carbon monoxide
•     oxygen
•     carbon-di-oxide

2. The primary cause of Taj Mahal marble yellowing is:

•     Rain Water
•     None
•     Acid rain

3.………….. is the contamination of water with unwanted and harmful substances.

•     Water pollution
•     Air Pollution
•     None

4. The presence of undesirable substances in the air is known as …………

•     air pollution
•     water pollution
•     soil pollution

5. Air pollution should be controlled by encouraging the use of LPG and CNG.

•     None
•     False
•     True

6. …………….. is caused by the release of hot water into water bodies.

•     Thermal pollution
•     None
•     Water Pollution

7. The ozone layer protects us against UV rays.

•     None
•     True
•     False

8. Which of the following fuels is the least polluting?

•     Petrol
•     CNG
•     Diesel

9. Sunlight can remove all contaminants from water.

•     None
•     False
•     True

10. CNG is the abbreviation for ……………….

•     compressed nitrogen gas.
•     None
•     compressed natural gas.