Question
Ozone depletion in the atmosphere has been linked to ______.
This question was previously asked in
SSC GD Constable 2018 Question Paper PDF Hindi (8-Mar-2019) (Shift 3)
The correct answer is
Chlorofluorocarbon
Chlorofluorocarbons (CFCs), used in refrigerators, air conditioners and aerosol sprays, rise to the stratosphere.
There UV radiation breaks them to release chlorine atoms: Cl + O3 → ClO + O2, and ClO + O → Cl + O2, so one chlorine atom can destroy thousands of ozone molecules.
The Montreal Protocol (1987) was adopted to phase out CFCs; Teflon, Bakelite and PVC are polymers not linked to ozone depletion.
Hence, Chlorofluorocarbon.
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Important Questions from Ozone Layer Depletion
- Which of the following is a catalytically inactive (or reservoir) molecule containing chlorine in stratosphere?
- Choose the correct statement(s)
A. O$_3$ in stratosphere is not completely effective in shielding us from UV-B
B. UV-A is biologically least harmful.
C. Chapman mechanism deals with only O$_3$ formation in stratosphere.
D. Sunscreen lotions either reflect or absorb or scatter UV-B and UV-A
E. UV-B helps in dissociation of O$_3$ molecule in stratosphere.
Choose the correct answer from the options given below. Ozone layer depletion is a major phenomenon in :
- With regard to ozone depletion over Antarctica, select the false statement :
- Atmospheric life times of CFCs is typically in the range :
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