Q43 / 180 · COMEDK 2018 · Chemistry

Which cycloalkane has the lowest heat of combustion per $\mathrm{CH}_{2}$ group?

A
cyclopropane
B
cyclobutane
C
cyclopentane
Correct answer
D
cyclohexane

Solution

Cyclohexane has the lowest heat of combustion per $\mathrm{CH}_{2}$ group. As, stability increase upto 6 membered ring due to decrease in angular strain. Also heat of combustion is measure for chemical stability.

Hence, the correct answer is option: 'D'.

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