Arrange the following carbocation in the increasing order of stability.

I < I I < I I I

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I I < I I I < I

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I I I < I I < I

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I I I < I < I I

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Solution

The correct option is A $I I < I I I < I$
Stability order is $I > I I > I I I$ Carbocation $I$ is most stable due to charge is in resonance with $π$ electrons. Carbocation $I I$ is more stable than $I I I$ due to greater hyperconjugation effect of adjacent alkyl group hydrogens.

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Arrange the following carbocations in decreasing order of stability

C H_{3} O N a

^{\oplus} C H_{2} - C O C H_{3}

^{\oplus} C H_{2} - O C H_{3}

^{\oplus} C H_{2} - C H_{3}

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