Which of the following ozone-depleting substances are correctly matched with their primary sources?

General Science ·Previously asked in JKSSB Laboratory Attendant 2026

View the full solved paper: JKSSB Laboratory Attendant – 10 May 2026

Question

Which of the following ozone-depleting substances are correctly matched with their primary sources?

  1. A. Halons - Soil fumigant
  2. B. Methyl bromide - Degreasing solvent
  3. C. Hydrochlorofluorocarbons (HCFCs) - Fire extinguishers
  4. D. Chlorofluorocarbons (CFCs) - Refrigerants and aerosol propellants (Correct answer)

Correct Answer

Option D — Chlorofluorocarbons (CFCs) - Refrigerants and aerosol propellants

Detailed Solution & Explanation

The correct answer is Chlorofluorocarbons (CFCs) - Refrigerants and aerosol propellants.

Key Points

  • CFCs are used as refrigerants and aerosol propellants - the primary ODS.
  • Halons are fire extinguishers.
  • Methyl bromide is a soil fumigant.
  • HCFCs are refrigerant/solvent alternatives.

Topics covered: Environment Ozone Layer Chemistry