Arrange the following compounds in decreasing order of their heats of combustion:

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(iii) > (i) > (ii)

(ii) > (i) > (iii)

(iii) > (ii) > (i)

(i) > (ii) > (iii)

answer is D.

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Detailed Solution

Stability of cyclic compounds 6-membered > 5-membered > 3-membered and reactivity or heat of combustion is reversed. So answer is (4),i> ii > iii

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