Chemistry - GOC Question with Solution | TestHub

The formulae differ : (a) is $C_5$$H_8$, (b) is $C_6$$H_{10}$ and (c) is $C_4$$H_6$. The molar heat of combustion rises with the number of carbons, so b $>$ a $>$ c. These values cannot be used to compare stability because the molecular formulae differ.