Asked in PMC Practice Test 36 (2021) 2021Moderate

Which of the following gives a free radical reaction when it reacts with alkanes?

Correct answer: C. Halogen

  • A. Nitric acid
  • B. Oxygen
  • C. Halogen
  • D. All of these options are correct

Explanation

When halogens react with alkanes, the reaction is a free radical reaction. The reaction involves three steps: initiation, propagation, and termination.

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About Free Radical Substitution

Free radical substitution explains how alkanes react with halogens under ultraviolet light or heat through initiation, propagation and termination steps. The mechanism involves homolytic bond fission and radical intermediates, while product formation depends on the relative stability of radicals and differs from ionic substitution.

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