Top PYQ MCQs on Ozone Layer Set -2
Q16. Which is the lowest layer of the atmosphere? [Uttarakhand PCS (Pre) 2016]
[A] Stratosphere
[B] Ozonosphere
[C] Ionosphere
[D] Troposphere
Q17. Why is the ozone layer useful to humanity? [MPPCS (Pre) 1994]
[A] It supplies oxygen to the atmosphere
[B] It prevents the Sun’s ultraviolet rays from reaching the Earth
[C] It controls the temperature of the Earth
[D] None of the above
Q18. The formation of the ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole? [Meghalaya PSC (Pre) 2017 IAS (Pre) 2011]
[A] Presence of prominent tropospheric turbulence and inflow of chlorofluorocarbons
[B] Presence of prominent polar front and stratospheric clouds and inflow of chlorofluorocarbons
[C] Absence of polar front and stratospheric clouds and inflow of methane and chlorofluorocarbons
[D] Increased temperature in the polar region due to global warming
Q19. The radiation that is absorbed by ozone present in the atmosphere is: [UPPCS (Pre) 2013]
[A] Infrared
[B] Visible
[C] Ultraviolet
[D] Microwave
Q20. Which of the following is not correctly matched? [Uttarakhand PCS (Mains) 2002]
[A] Ozone – Chlorofluorocarbon (CFC)
[B] Acid rain – Nitric acid
[C] Rocket fuel – Kerosene oil
[D] Green House – Carbon Dioxide Effect
Q21. Which one of the following is associated with the issue of control and phasing out of the use of ozone-depleting substances? [IAS (Pre) 2015]
[A] Bretton Woods Conference
[B] Montreal Protocol
[C] Kyoto Protocol
[D] Nagoya Protocol
Q22. Formation of the ozone hole is maximum over [Sikkim PSC (Pre) 2019 MPPCS (Pre) 2008]
[A] India
[B] Africa
[C] Antarctica
[D] Europe
Q23. Which of the following is not true about chlorofluorocarbon? [UP Lower Sub. (Pre) 2004]
[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
Q24. Consider the following statements.
Chlorofluoro carbons, known as ozone-depleting substances, are used:
- In the production of plastic foams.
- In the production of tubeless tyres.
- In cleaning certain electronic components.
- As pressurizing agents in aerosol cans.
Which of the statements(s) given above is/are correct? [West Bengal PSC (Pre) 2019 IAS (Pre) 2012]
[A] 1, 2, and 3
[B] Only 4
[C] 1, 3 and 4
[D] 1, 2, 3 and 4
Q25. Ozone protects the biosphere from [Arunachal Pradesh PSC (Pre) 2016 UPPCS (Pre) 2014]
[A] Infrared rays
[B] Ultraviolet rays
[C] X-rays
[D] Gama rays
Q26. In the stratosphere, the level of ozone is naturally regulated by [UPPCS (Mains) 2016]
[A] Nitrous oxide
[B] Nitrogen dioxide
[C] CFC
[D] Water vapours
Q27. Which of the following substances is/are ozone-depleting?
1. Chlorofluoro carbons
2. Halans
3. Carbon tetrachloride
Select the correct answer from the codes given below. [Kerala PSC (Pre) 2019 UPPCS (Pre) 2012]
#Code
[A] Only 1
[B] Only 1 and 2
[C] Only 1 and 3
[D] 1, 2 and 3
Q28. Montreal Protocol is related to the protection of [Chhattisgarh PCS (Pre) 2015 Uttarakhand PCS (Pre) 2010]
[A] Greenhouse gases
[B] Acid rain
[C] Ozone layer
[D] Endangered species
Q29. 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. [UP UDA/LDA (Mains) 2010 UPPCS (Mains) 2010]
[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
