NEET 2013 Chemistry Free Radicals MCQ Question
Homolytic fission of the following alkanes form free radicals CH₃ - CH₂ - CH₂, CH₃ - CH₂ - CH₂, CH₃ - CH₂ - CH₂. Increasing order of stability of the radicals is:
(CH₃)₂C• - CH₂CH₃ < CH₃ - CH₂ - CH₃ < CH₃ - CH₂ - CH₂
CH₃ - CH₂ - CH₂ < CH₃ - CH₂ - CH₂ < (CH₃)₂C•
CH₃ - CH₂ - CH₂ < CH₃ - CH₂ - CH₂ < (CH₃)₂C•
(CH₃)₂C• < (CH₃)₂C• - CH₂CH₃
Correct Answer
Detailed Explanation
The stability of free radicals increases with the number of alkyl groups attached to the radical center. Tertiary radicals are more stable than secondary, which are more stable than primary.
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