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Which amongst the following is the most stable carbocation?

1. (a) ⊕CH₃
2. (b) CH₃CH₂⊕
3. (c) CH₃−CH⊕−CH₃
4. (d) CH₃C⊕(CH₃)₂

Correct answer: (d) CH₃C⊕(CH₃)₂

Solution

The stability of carbocations increases with the number of alkyl groups attached to the positively charged carbon due to hyperconjugation and inductive effects. The carbocation in option (d) is tertiary, making it the most stable.

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