Arrange in the order as directed-
The given alkenes in the order of their stability (1- most stable, 3-least stable).

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Solution

Compound 'A' is most stable than 'B' and the compound 'C' is least stable.
More the number of pi bonds more will be the stability of the resonating structure.
In the case of compound A the two sigma bonds out side the ring can form 2 pi bonds, resulting in overall 3 pi bonds in side the ring.
In case of compound 'B' one sigma bond present present outside the ring can form a pi bond, resulting in overall 2 pi bonds inside the ring.
In case of compound 'C' there is no possibility of forming a pi bond with the external sigma bonds.

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^{2 +}

^{2 +}

_{2}

_{3}

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(C H_{3})_{2} C H - + O H_{2} \to (C H_{3})_{2} C H^{+} + H_{2} O

I, I I

I I I

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