Home PYQs UPPSC UPPSC MCQs Prelims 2012 (GS Paper I)

Question

Which of the following substances is/are ozone depleting? Select the correct answer from the codes given below:

A. Chlorofluoro Carbons
B. Halans
C. Carbon tetrachloride

Codes:

  1. 1 only
  2. 1 and 2 only
  3. 2 and 3 only
  4. 1, 2 and 3

Answer:

Option D: 1, 2 and 3

Detailed Solution:

The correct answer is “1, 2 and 3”.

Ozone-depleting substances (ODS) include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, Hydro Bromo fluorocarbons, chlorobromomethane, and methyl chloroform.