Assertion :2,3-Dimethylbut-2-ene is more stable than but-2-ene. Reason: Six hyperconjugation structures can be written for 2,3-dimethylbut-2-ene while but-2-ene has twelve.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
2,3-Dimethylbut-2-ene is more stable than but-2-ene.
Twelve hyper-conjugation structures can be written for 2,3-dimethylbut-2-ene while but-2-ene has six. More is the number of methyl groups attached to doubly bonded C atom, greater is the number of hyper-conjugation structures. Greater is the number of hyper-conjugation structures, greater is the stability of alkene. Assertion is correct but Reason is incorrect.

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