1.

Which is the most stable carbocation

Answer»

Iso-propyl
Triphenylmethyl cation
Ethyl cation
`pi`- propyl cation

Solution :Stability of carbonium ions. `Ph_(3)overset(+)(C) gt Ph_(2) overset(+)(C)H gt Phoverset(+)(C)H_(2)` tertiary alkyl `gt` secondary alkyl `gt` primary alkyl `gt` METHYL. More the number of phenyl groups, the greater the DISPERSAL of positive charge and therefore, more the stability of carbonium ion is observed.

Dispersal of positive charge increases with the INCREASE in the number of benzene ring.


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