Question

Which of the following is associated with Ozone destruction in the Stratosphere?
(A) CFCs
(B) Polar stratospheric clouds
(C) UV-B
(D) UV-A
(E) Cl radicals
Correct Answer: Option (4) (A), (B), (C) and (D)

• A. (A) and (E) only
• B. (A), (B), and (E) only
• C. (A), (C), and (D) only
• D. (A), (B), (C), and (E) only

Answer 1

The Correct Option is B

The factors associated with ozone destruction in the stratosphere are (A) CFCs, (B) Polar stratospheric clouds, and (E) Cl radicals.

Additional Context:

• Ozone Depletion Process:
  • CFCs (A): Break down to release chlorine atoms
  • Polar stratospheric clouds (B): Provide surface for chlorine activation
  • Cl radicals (E): Catalyze ozone destruction (1 Cl atom can destroy 100,000 ozone molecules)
• About UV Radiation:
  • UV-C (not listed) creates ozone, doesn't destroy it
  • UV-B/A (C/D) are blocked by ozone, not causes of depletion
• Scientific Evidence:
  • Antarctic ozone hole discovered in 1985
  • Montreal Protocol (1987) successfully phased out CFCs

Correct Answer: (2) (A), (B) and (E) only.