The order of heat of hydrogenation in following compound is :
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a
I < II < IV < III
b
III < IV < II < I
c
II < III < I < IV
d
II < IV < I < III
answer is B.
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Detailed Solution
Heat of hydrogenation ∝ 1stability of alkene(III) is more stable due to the presence of Resonance and hyperconjugation(IV) Stability is due to Resonance.(II) Stability is due to hyperconjugation.(I) no hyperconjugation and no Resonance.∴order of stability is III > IV > II > I