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COMEDK2025ChemistryHaloalkanes and HaloarenesActual

Which of the following reaction can be used for the preparation of flouromethane?

Options

  1. ACH ₃ Br + AgF
  2. BCH ₄+ F ₂
  3. CCH ₃ OH + HF
  4. DCH ₃ NH ₂+ HF

Correct answer

A. CH ₃ Br + AgF

Step-by-step solution

The preparation of alkyl fluorides from alkyl halides is typically achieved using the Swarts reaction. In this reaction, an alkyl bromide or alkyl chloride is treated with a metallic fluoride such as AgF , Hg ₂ F ₂ , or CoF ₂ . The reaction is represented as: CH ₃ Br + AgF CH ₃ F + AgBr . The other options are not suitable for the preparation of fluoromethane: CH ₄ + F ₂ is an extremely violent and uncontrolled free-radical substitution reaction, while CH ₃ OH + HF and CH ₃ NH ₂ + HF do not undergo simple nucleophi

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