Q1. Air pollution is

a. Carbon dioxide b. Dust

c. Nitrogen oxide d. All of these

Q2. What mixture of gases does

air consists?

a. Carbon dioxide & Hydrogen

b. Nitrogen & Oxygen

Q3. When air is contaminated by

unwanted substances what it is

referred to

a. Noise pollution b. Water pollution

c. Air pollution d. Land pollution

Q4. Which are the sources of air

pollution?

a. Factories b. Power plants

c. Auto-mobiles exhaust d. All of these

Q5. Vehicles produce ______ of

pollutants carbon monoxide,

carbon dioxide and smoke

a. High level b. Low level

c. Moderate level d. None of these

Q6. Smoke may contain oxides of

_____ which combine air pollutants

a. Hydrogen b. Nitrogen

c. Oxygen d. Carbon dioxide

Q7. What are the major contaminants

of water

a. Sewage b. Agricultural chemicals

c. Industrial waste d. All of these

Q8. The worst air pollutant that is

carbon dioxide is mainly emitted from

a. Power plants b. Cars

c. Burning of fossil fuels d. All of these

Q9. Smog is the product of atmospheric

pollution by

a. Carbon dioxide b. Nitrogen oxide

c. CFCs d. None of these

Q10. Which of the following help

pollution occur?

a. Burning of fossil

fuels

b. Spilling chemicals in

rivers

c. Oil spills in the

oceansd. All of these

Q11. Petroleum refineries are major

sources of _______

a. Liquid pollutants b. Gaseous pollutants

c. Both (a) and (b) d. None of these

Q12. Which layer of atmosphere is

damaged by CFC

a. Troposphere b. Ozone

c. Hemisphered. Stratosphere

Q13. _______ leads to increase of Co2

in the atmosphere

a. Drought b. Global warming

c. Green house effect d. Deforestation

Q14. Ganga Action Plan was launched

in

a. 1984 b. 1995

c. 1980 d. 1985

Q15. At which place Ganga river is

most polluted

a. Bihar b. Lucknow

c. Kanpur d. Both (a) and (b)

Q16. What are the factors responsible

for pollution of the rivers?

a. Oil spills b. Washing cloths

c. Throwing bags d. All of these

Q 17. Which industries discharge

harmful chemicals into rivers

a. Oil refineries b. Chemical factories

c. Paper factories d. All of these

Q18. Why a lot of algae grow in

ponds?

a. Because of insects b. Because of chemicals

c. Both (a) and (b) d. None of these

Q19. Potable water is suitable for

a. Bathing b. Cooking

c. Drinking d. None of these

Q20. How many percent of people

are without safe drinking water in the

world?

a. 21 % b. 50 %

c. 75 % d. 25 %

Q21. What happens when people

dump wastes from homes or factories

into oceans, lakes or rivers?

a. It flows to other

parts of the world

b. It kills animals and

plants living there

c. It cause water

pollution

d. Both (b) and (c)

Q22. The substances which

contaminate the air and water are

called

a. Pollutants b. Potable water

c. CNG d. None of these

Q23. Smog is mixture of which

substance?

a. Smoke and Fog b. Sulphure dioxide

and Nitrogen oxide

c. Oxygen and

Nitrogend. Dust and Fog

Q24. Fertilizer washed into rivers can

cause excessive growth of

a. Microorganisms b. Algae

c. Fungi d. Sea snakes

Q25. Refrigerators and air contioners

have one of the following gas

a. Hydrochloric acid b. Methane

c. Chlorofluorocarbon d. Sulphuric acid

Q26. What is the full form of CFC?

a. Chemical factors of

carbon dioxide

b. Chlorofluorocarbons

c. Components of

fluid in crude oil

d. None of these