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Arrange the following alkenes in increasing order of their enthalphy of hydrogenation

 

$\begin{array}{1 1}a)\;111 < 1V < 11 < 1\\b)\;111 < 1V <1 < 11\\c)\;1 < 11 < 111 < 1V\\d)\;1 < 11 < 1V <111\end{array}$

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Structure 111 ,1 has exo double bonds, but 111 has trans form which has lowest enthalphy of hydrogenation and has greater stability
Hence (a) is the correct answer.
answered Dec 3, 2013 by sreemathi.v
 

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