When benzene undergoes hydrogenation in the presence of a catalyst, the energy that is released (the heat of hydrogenation) is:
A
same as for cyclohexatriene
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B
same as for 1, 3- cyclohexadiene
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C
same as for 1, 4- cyclohexadiene
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D
less than for cyclohexatriene
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Solution
The correct option is B less than for cyclohexatriene Heat of hydrogenation of benzene is less than that of cyclohexatriene due to resonance energy of benzene.