Question

Q. Which of the following are Ozone Depleting Substances (ODS)?

Select the correct answer using the code given below.

• A.
  1 and 3 only
• B.
  1, 2, 3 and 4
• C.
  2 and 4 only
• D.
  1, 2 and 4 only

Answer 1

The correct option is D

1, 2 and 4 only
Explanation:

Ozone depleting substances are chemicals that destroy the earth's protective ozone layer. They include:

• chlorofluorocarbons $\left(CFCs\right)$
• halon.
• carbon tetrachloride $\left(CC{l}_4\right)$
• methyl chloroform $\left(C{H}_{3}CC{l}_3\right)$
• hydrobromofluorocarbons $\left(HBFCs\right)$
• hydrochlorofluorocarbons $\left(HCFCs\right)$
• methyl bromide $\left(C{H}_{3}Br\right)$
• bromochloromethane $\left(C{H}_{2}BrCl\right)$

HFCs are not included as ODS.