Question

Which of the following is/are ODS (Ozone Depleting Substances)? (a) HBFC
(b) Methyl Chlorofluoride
(c) Carbon Tetrachloride
(d) Methyl Bromide
Which of the options is correct?

• A. Only 1
• B. 1, 2 and 3
• C. 1 and 2
• D. None of the above

Hint:

For environment-related MCQs: \begin{itemize} \item Remember chemicals listed under the Montreal Protocol, \item Substances containing chlorine and bromine often deplete ozone, \item Distinguish between ODS and greenhouse gases. \end{itemize}

Answer 1

The Correct Option is B

Step 1: Ozone Depleting Substances (ODS) are chemicals that damage the ozone layer when released into the atmosphere.
Step 2: HBFCs (Hydrobromofluorocarbons) are classified as ODS due to their ozone-depleting potential.
Step 3: Methyl Chlorofluoride contains chlorine, which contributes to ozone depletion, hence it is an ODS.
Step 4: Carbon Tetrachloride is a well-known ODS and has been regulated under the Montreal Protocol.
Step 5: Therefore, statements (a), (b), and (c) are correct.