Question

Pick the correct options:

1. Highest percentage of air consists of
a. Oxygen b. Carbon dioxide c. Nitrogen d. Argon

2. The Taj Mahal is being affected by
a. Noise pollution b. Air pollution c. Water pollution d. None of these

3. Most polluted river in the world is
a. Yamuna b. Cauvery c. Chenab d. Ganga

4. Air pollution causes
a. Global warming b. Respiratory problems c. Soil erosion d. None of these

5. Greenhouse gas is
a. Nitrogen b. Oxygen c. Methane d. Carbon dioxide

6. CNG is a
a. Polluted fuel b. Clean fuel c. Harmful fuel d. None

7. What causes pollution
a. Human activities b. Trees c. Both of these d. None of these

8. Pollution of water is responsible for
a. Oil refineries b. Paper factories c. Sugar mills d. All

9. Chlorofluorocarbon is used in
a. Refrigerators b. Air conditioners c. Perfumes d. All

10. The increase in concentration of which gas is not responsible for Global Warming?
a. Sulphur dioxide b. Nitrogen c. Carbon dioxide d. Methane

11. Which of the following contents is most harmful to aquatic animals?
a. Heavy metal ions b. Sodium ions c. Potassium ions d. Chloride ions

12. Which of the following techniques of irrigation should be used to save water?
a. Water wheel b. Canal irrigation c. Drip irrigation d. Lift irrigation

13. The percentage of nitrogen is
a. 21% b. 78% c. 12% d. 87%

14. Which of the following contents is most harmful to aquatic animals?
a. Heavy metal ions b. Sodium ions c. Potassium ions d. Chloride ions

15. Which of the following techniques of irrigation should be used to save water?
a. Water wheel b. Canal irrigation c. Drip irrigation d. Lift irrigation

16. CNG is a
a. Polluted fuel b. Clean fuel c. Harmful fuel d. None

17. What causes pollution
a. Human activities b. Trees c. Both of these d. None of these

18. Pollution of water is responsible for
a. Oil refineries b. Paper factories c. Sugar mills d. All


(i know its a lot but please help and get 100 points)

Answer 1

Answer:

1. C

2. B

3. D

4. B

5. D

6. B

7. A

8. B

9. D

10. D

11. D

12. C

13. B

14. D

15. C

16. B

17. A

18. A

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Answer 2

Answer:

1st (A) , 2nd (B) , 3rd c 4th c 5th a 6th b 7th a 8 d 9 a 10 c 11 b 12 a 13 c 14 b 15 d 16 c 17a 18 b

Explanation: