Which among the following is a formula of mustard gas?

Which among the following is a formula of mustard gas?
  1. $\mathrm{COCl}_2$
  2. $\mathrm{COCl}_2$
  3. $\mathrm{S}\left(\mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Cl}\right)_2$
  4. $\mathrm{CCl}_3 \mathrm{NO}_2$

Solution

Mustard gas, or sulfur mustard $\mathrm{S}\left(\mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Cl}\right)_2$, is a chemical agent that causes severe burning of the skin, eyes, and respiratory tract.

Asked in: MHT CET 2021 (23 Sep Shift 1)

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