Top PYQ MCQs on Ozone Layer

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Access a wide range of PYQ MCQs on the ozone layer to improve your understanding and test your knowledge. Enhance your learning experience with our valuable content.

Top PYQ MCQs on Ozone Layer Set -1

Q1. Who among the following had discovered the ‘ozone halo’ over the Tibetan Plateau in 2005? [UPPCS (Mains) 2013]

[A] M. Molina
[B] Joseph Farman
[C] G.W. Kent Moore
[D] Marcus Rex

Answer – [C] G.W. Kent Moore

Q2. Which is responsible for the Ozone Hole? [Chhattisgarh PCS (Pre) 2014]

[A] CO2
[B] SO2
[C] O2

Answer – [D] CFC

Q3. World Ozone Day is celebrated on: [UPPCS (Pre) 2014, 2015]

[A] 16 September
[B] 21 April
[C] 25 December
[D] 30 January

Answer – [A] 16 September

Q4. The ozone layer is above the earth’s crust around [RAS/RTS (Pre) 2012]

[A] 50 km
[B] 300 km
[C] 2000 km
[D] 20 km

Answer – [D] 20 km

Q5. The ozone hole is caused by [UPPCS (Pre) 2016]

[A] Acetylene
[B] Ethylene
[C] Chlorofluorocarbons
[D] Methane

Answer – [C] Chlorofluoro carbons

Q6. Which of the following gases is responsible for the decrement in the ozone layer? [UPRO/ARO (Pre) 2014 42nd BPSC (Pre) 1997 Uttarakhand PCS (Pre) 2005]

[A] Nitrous oxide
[B] Chlorofluorocarbon
[C] Carbon dioxide
[D] Carbon mono-oxide

Answer –[B] Chlorofluoro carbon

Q7. Which one of the following is not responsible for the depletion of the ozone layer? [UPPCS (Pre) 2002 UP Lower Sub. (Pre) 2002]

[A] CFC-12 used in refrigerators
[B] Methyl chloroform used as a solvent
[C] HALON-1211 used in firefighting
[D] Nitrous oxide

Answer – [B] Methyl chloroform used as solvent

Q8. The radiation that is absorbed by ozone present in the atmosphere is: [UPPCS (Pre) 2013]

[A] Infrared
[B] Visible
[C] Ultraviolet
[D] Microwave

Answer – [C] Ultraviolet

Q9. Which greenhouse gases do not cause ozone pollution in the troposphere? [Himachal Pradesh PSC (Pre) 2017 UPPCS (Pre) 2008]

[A] Methane
[B] Carbon mono-oxide
[C] Nitrogen oxides (NO)
[D] Water vapours

Answer –[B] Carbon mono-oxide

Q10. Harmful ultraviolet radiation coming from the sun can cause: [UPPCS (Pre) 2014]

[A] Liver cancer
[B] Brain cancer
[C] Oral cancer
[D] Dermal cancer

Answer – [D] Dermal cancer

Q11. Montreal Protocol is related to: [Andhra Pradesh PSC (Pre) 2018 MPPCS (Pre) 2014]

[A] White Lion
[B] Chlorofluorocarbon
[C] Water pollution
[D] Agriculture

Answer – [B] Chlorofluoro carbon

Q12. A place where the ozone layer is primly found is [UPPCS (Pre)(Spl) 2008 UP UDA/LDA (Spl)(Mains) 2010]

[A] Troposphere
[B] Stratosphere
[C] Mesosphere
[D] Ionosphere

Answer –[B] Stratosphere

Q13. Which gas is filled in refrigerators? [Gujarat PSC (Pre) 2019 Uttarakhand PCS (Pre) 2010]

[A] Ammonia
[B] Mafron
[C] Methane
[D] Acetylene

Answer – [B] Mafron

Q14. The ozone layer in the atmosphere [UPPCS (Pre) 2006 Uttarakhand PCS (Pre) 2006 UP Lower Sub. (Pre) 2004]

[A] Produces rain
[B] Produces pollution
[C] Provides safety to life on Earth from ultraviolet radiation
[D] Produces oxygen in the atmosphere

Answer – [C] Provides safety to life on Earth from ultraviolet radiation

Q15. Which one of the following teams of scientists first discovered the ‘ozone hole’ over Antarctica? [UPPCS (Mains) 2013]

[A] Russian team
[B] German team
[C] American team
[D] British team

Answer –[D] British team

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