CBSE class 5 chapter pollution objectives
Answers
Answer:
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. Cavery
c. Chenab
d. Ganga
4. Air pollution causes
a. Global warming
b. Respiratory problems
c. Soil erosion
d. None of these
5. Green House gas is
a. Nitrogen
b. Oxygen
c. Methane
d. Carbon dioxide
6. The percentage of nitrogen is
a. 21%
b. 78%
c. 12%
d. 87%
7. What causes pollution
a. Human activities
b. Trees
c. Both of these
d. None of these
8. CNG is a
a. Polluted fuel
b. Clean fuel
c. Harmful fuel
d. None
9. Pollution of water is responsible for
a. Oil refineries
b. Paper factories
c. Sugar mills
d. All
10. Chlorofluorocarbon is used in
a. Refrigerators
b. Air conditioners
c. Perfumes
d. All
ANSWERS
1. C
2. B
3. D
4. B
5. D
6. B
7. A
8. B
9. D
10. D