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Alkenes on catalytic hydrogenation give ...

Alkenes on catalytic hydrogenation give alkanes. The reactions are exothermic. The heat of hydrogenation is a measure of stability of alkene. Lesser the heat of hydrogenation more stable the alkene.
The correct order of heat of hydrogenation is

A

`IVgtIIIgtIgtII`

B

`IIgtIgtIIIgtIV`

C

`IVgtIIIgtIIgtI`

D

`IIgtIIIgtIgtIV`

Text Solution

Verified by Experts

The correct Answer is:
B
Heat of hydrogenation is a measure of the stability of alkenes. Greater the number of alkyl groups attached to the double bonded carbon, more stable is the alkene. So, the alkene with maximum substitution will have the lowest value of heat of hydrogenation.
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