The correct order of heat of combustion for following alkadienes is:

The correct order of heat of combustion for following alkadienes is:

1. $\left(\mathrm{a}\right)<\left(\mathrm{b}\right)<\left(\mathrm{c}\right)$
2. $\left(\mathrm{a}\right)<\left(\mathrm{c}\right)<\left(\mathrm{b}\right)$
3. $\left(\mathrm{c}\right)<\left(\mathrm{b}\right)<\left(\mathrm{a}\right)$
4. $\left(\mathrm{b}\right)<\left(\mathrm{c}\right)<\left(\mathrm{a}\right)$

Solution

$\therefore$ Generally trans is more stable than cis form.

Heat of combustion $(\text{HOC})\propto \frac{1}{\text{ Stability }}$

Stability : a > b > c

HOC : c > b > a

Asked in: JEE Main 2020 (09 Jan Shift 1)

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