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MHT CET202615 April 2026Morning ShiftChemistryHaloalkanes and HaloarenesActual

Which of the following halogen derivative forms a poisonous phosgene, when come in contact with air and light?

Options

  1. ACHCl ₃
  2. BPCl ₃
  3. CC ₆ H ₅ Cl
  4. DCH ₂ Cl ₂

Correct answer

A. CHCl ₃

Step-by-step solution

Chloroform ( CHCl ₃ ) is slowly oxidized by oxygen in the presence of light to form a highly poisonous gas, carbonyl chloride, which is commonly known as phosgene. The chemical reaction is given by: 2 CHCl ₃ + O ₂ h 2 COCl ₂ + 2 HCl Therefore, CHCl ₃ forms poisonous phosgene when it comes in contact with air and light.

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