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Among 1-pentene, cis-2-pentene and trans-2-pentene the correct order of stability is
 

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By Expert Faculty of Sri Chaitanya
a
1-pentene > cis-2-pentene > trans-2-pentene
b
1-pentene > cis-2-pentene < trans-2-pentene
c
1-pentene < cis-2-pentene > trans-2-pentene
d
1-pentene < cis-2-pentene < trans-2-pentene

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detailed solution

Correct option is D

In cis-isomers two alkyl groups on same side of the π plane create more steric hindrance, so trans-isomers is more stable than cis.Hence, the correct answer is (4).


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