Multiple
Choice Questions (MCQ Quiz) on OZONE LAYER section of Environment & Ecology with answers and explanation.
The MCQ based on Previous Year Questions (PYQ) of various exams such as
UPSC, UPPSC, BPSC, MPPSC Prelims. It is useful for various competitive exams
like UPSC, UPPSC, BPSC, IAS/PCS and others.
Previous Year Questions (PYQ) of UPPSC (Prelims) on OZONE LAYER:
Q
1. Place where Ozone Layer is primarily found is:
(a)
Troposphere
(b)
Mesosphere
(c)
Stratosphere
(d)
Ionosphere
Answer
(c)
Q
2. Ozone layer is above the earth crust around:
(a)
50 km.
(b)
300 km.
(c)
2000 km.
(d)
20 km.
Answer
(d)
Q
3. Which is the lowest layer of the Atmosphere?
(a)
Stratosphere
(b)
Ozonosphere
(c)
Ionosphere
(d)
Troposphere
Answer
(d)
Q
4. Which of the following is not true about chlorofluoro- carbon?
(a)
It is used as a refrigerant.
(b)
It is not responsible for the greenhouse effect
(c)
It is responsible for reducing ozone in the stratosphere.
(d)
It is inactive in the lower atmosphere
Answer
(b)
Q
5. Ozone Layer in atmosphere:
(a)
Produces Rain
(b) Produces Pollution
(c) Provide safety to life on earth from ultraviolet
radiation
(d) Produces oxygen in the atmosphere
Answer
(c)
Q
6. The radiation that is absorbed by ozone present in the atmosphere is:
(a)
Infrared
(b)
Ultraviolet
(c)
Visible
(d)
Microwave
Answer
(b)
Q
7. Ultraviolet radiation from sunlight causes the reaction that produce which
of the following?
(a)
CO
(b)
SO₂
(c)
O3
(d)
Fluorides
Answer
(c)
Q
8. Ozone layer in atmosphere:
(a)
Produces rain
(b)
Produces pollution
(c)
Protect the biosphere
(d)
Produces oxygen in the atmosphere
Answer
(c)
Q
9. Harmful ultraviolet radiation coming from the sun can Cause:
(a)
Brain
cancer
(b)
Skin
cancer
(c)
Liver
cancer
(d)
Oral
cancer
Answer
(b)
Q
10. “Ozone Layer Preservation Day” is celebrated on:
(a)
16 September
(b)
23 March
(c)
5 June
(d)
21 April
Answer
(a)
Q
11. Which one of the following is not responsible for the depletion of ozone
layer:
(a)
CFC-12 used in refrigerators
(b)
Methyl chloroform used as a solvent
(c)
HALON-1211 used in fire fighting
(d)
Nitrous oxide
Answer
(b)
Q
12. Among the following greenhouse gasses, which does not cause ozone depletion
in the
troposphere?
(a)
Methane
(b)
Carbon mono-oxide
(c)
Nitrogen Oxides (NO)
(d)
Water vapours
Answer
(b)
Q
13. Formation of the ozone hole is maximum over:
(a)
India
(c)
Antarctica
(b)
Africa
(d)
Europe
Answer
(c)
Q
14. Montreal Protocol is related to the protection of:
(a)
Greenhouse gases
(b)
Acid rain
(c)
Ozone layer
(d)
Endangered species
Answer
(c)
Q
15. In stratosphere, the level of ozone is naturally regulated by:
(a)
Nitrous oxide
(b)
Nitrogen dioxide
(c)
CFC
(d)
Water vapours
Answer
(a)
Q
16. Which of the following substances is/are ozone depleting? Select the
correct answer from the codes given below:
1.
Chlorofluoro Carbons
2.
Halans
3.
Carbon tetrachloride
Codes:
(a)
I only
(b)
1 and 2 only
(c)
1 and 3 only
(d)
1, 2 and 3
Answer
(d)
Q
17. Which gas is filled in refrigerators?
(a)
Ammonia
(b)
Methane
(c)
Mafron
(d)
Acetylene
Answer
(c)
Q
18. Who among the following had discovered ozone halo over Tibetan Plateau in
2005?
(a)
M. Molina
(b)
Joseph Farman
(c)
GW. Kent Moore
(d)
Marcus Rex
Answer
(c)
Q
19. Consider the following statements:
Assertion
(A): Ozone is essential for biotic life.
Reason
(R): The ozone layer protects the earth’s Surface from high energy radiation.
Select
the correct answer from the code given below:
(a)
Both (A) and (R) are true and (R) is the correct Explanation of(A)
(b)
Both (A) and (R) are true but (R) is not the correct explanation of (A) .
(c)
(A) is true but (R) is false
(d)
(A) is false but (R) is true
Answer
(a)
(d) 1990
Answer (c)
Q
20. Montreal Protocol is related to:
(a)
Water
Pollution
(b)
Greenhouse
Gas
(c)
Ozone
Depleting Substances
(d)
Both
(b) and (c)
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