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Question

What is the order of stability for
I. 1-butene; II cis-2-butene; III. trans-2-butene?

A
I < II < III
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B
I > II > III
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C
III > I > II
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D
I > II < III
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Solution

The correct option is A I < II < III
stability of alkene is judge by no. of αhydrogens.More the no. αhydrogen more the will be hyperconjuction more will be stability of alkene. cisalkene is less stable than trans alkene so order of stablity is
(i)<(ii)<(iii)

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