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Sticky Note
The given reaction is the example of Free Radical Substitution (CH₄ + Cl₂ → CH₃Cl + HCl). The order of this reaction is?
  1. Zero
  2. First
  3. Second
  4. Third
Explanation
  • The free radical substitution reaction of CH₄ with Cl₂ is a zero-order reaction.
  • Its rate does not depend on the concentration of reactants under steady conditions.
  • The reaction proceeds via chain mechanism (initiation, propagation, termination).
  • So overall observed order is zero.

Last verified on 05-06-2026

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