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MHT CET202522 Apr 2025Morning ShiftChemistryChemistry in Everyday LifeActual

What is formula of mustard gas?

Options

  1. ACOCl ₂
  2. BCl - CH ₂- CH ₂- S - CH ₂- CH ₂- Cl
  3. CCCl ₃ NO ₂
  4. DCCl ₂ ~F ₂

Correct answer

B. Cl - CH ₂- CH ₂- S - CH ₂- CH ₂- Cl

Step-by-step solution

Mustard gas , systematically named bis(2-chloroethyl) sulfide, has the molecular structure Cl - CH ₂- CH ₂- S - CH ₂- CH ₂- Cl . Among the options, COCl ₂ corresponds to phosgene, CCl ₃ NO ₂ is chloropicrin, and CCl ₂ F ₂ is dichlorodifluoromethane—none match mustard gas. The correct representation is therefore option B.

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