A) \[C{{H}_{2}}=C{{H}_{2}}\]
B) \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\]
C) \[C{{H}_{3}}CH=CHC{{H}_{3}}\]
D) \[{{\left( C{{H}_{3}} \right)}_{2}}C=C{{\left( C{{H}_{3}} \right)}_{2}}\]
Correct Answer: A
Solution :
[a] The heat of hydrogenation of an alkene depends upon its stability. Higher the stability, lower the heat of hydrogenation. Since \[C{{H}_{2}}=C{{H}_{2}}\] has no substituent, it is the least stable alkene and hence has the highest heat of hydrogenation
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