UPSC NCERT ENVIRONMENT NOTES: TOPIC WISE SOLVED MCQ’s

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1. Which of the following are the main component gases of GreenHouse Gases emission?
1. Carbon dioxide
2. Methane
3. Nitrogen
4. Nitrous oxide
Which of the statements given above is/are correct?
a) Only 1, 2 and 3
b) Only 1, 2 and 4
c) Only 3 and 4
d) 1, 2, 3 and 4
Ans: B

2. Which of the following organization contributed International Panel on climate change (IPCC)?
1. United Nations Environment Program (UNEP)
2. World Trade Organisation (WTO)
3. World Meteorological Organisation (WMO)
Which of the statements given above is/are correct?
a) Only 1 and 2
b) Only 1 and 3
c) Only 2 and 3
d) 1, 2 and 3
Ans: B

3. Which of the following is the evidence of Global Warming?
1. Increase in air temperatures.
2. Melting of Mountain and Continental Glaciers.
3. Spreading of Tropical diseases towards temperate and polar regions.
4. Thawing of permafrost areas
Which of the statements given above is/are correct?
a) Only 1 and 2
b) Only 1, 2 and 3
c) Only 3 and 4
d) 1, 2, 3 and 4
Ans: D

4. Consider the following statements:
1. The ozone layer is concentrated in the upper part of the Troposphere.
2. The ozone layer is considered as a protective shield and earth’s umbrella.
Which of the statements given above is/are correct?
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Ans: B

5. Consider the following statements:
1. The ozone layer prevents ultraviolet (UV) solar radiation from reaching the earth’s surface.
2. The presence of the ozone layer is of vital significance for plants, animals, and man.
Which of the statements given above is/are correct?
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Ans: C

6. Which of the following effects on human health are caused by ozone depletion?
1. Sunburn
2. Cataract
3. Skin cancer
Which of the statements given above is/are correct?
a) Only 1 and 2
b) Only 1 and 3
c) Only 2 and 3
d) 1, 2 and 3
Ans: D

7. Which of the following statements is correct?
a) Ozone gas is measured in Dobson units.
b) Chlorofluorocarbons lead to Ozone depletion.
c) Halons are dangerous to Ozone layers.
d) All of the above.
Ans: D