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JEE Main levelOne or more correct optionsDifficulty 2 of 3hx011

Which of the following correctly describe the reactions of N-bromosuccinimide (NBS) with light or peroxide in $CCl X_{4}$ ?

ABenzene gives bromobenzene.
BPropene gives 3-bromoprop-1-ene.
CToluene gives benzyl bromide ( $C X_{6} H X_{5} CH X_{2} Br$ ).
DCyclohexene gives 3-bromocyclohexene.

Answer: B, C, D

NBS gives a low steady concentration of

Br X_{2}

and brominates allylic and benzylic C-H bonds through stabilised radicals. Propene, toluene and cyclohexene react at the allylic or benzylic position. Benzene has no such C-H bond and is not brominated by NBS.

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