1.

In which of the following reactions, addition does not occur according to Markovnikov's rule?

Answer»

`CH_3 CH = CH_2 + HCl overset(ROOR) (to)`
`CH_3 CH = CH_2 + HBr overset(ROOR)(to)`
`CH_(2) = CH_(2) + HI overset (ROOR)(to)`
`CH_(3) CH= CHCH_(3) + HBr overset(ROOR)(to)`

Solution :In PRESENCE of PEROXIDES , only the addition of HBr to unsymmetrical alkenes does occur according to Markovnikov.s RULE . SINCE alkene (b) is unsymmetrical while alkene (d) is symmetrical , therefore , the correct answer is (b) .


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