(A) (i) What are structural isomers? Draw structural isomers of butane ( C_4 H_10). Give reason why propane has no structural isomers? (ii) What…

What are structural isomers ? Draw structural isomers of butane $\displaystyle \left(\mathrm{C}_{4} \mathrm{H}_{10}\right)$. Give reason why propane has no structural isomers ?

What happens when butane is burnt in air ? Write chemical equation for the reaction. Differentiate between the flames obtained when butane and butyne both are burnt in air in the similar conditions.

Give reason why carbon can neither form $\displaystyle \mathrm{C}^{4+}$ cations nor $\displaystyle \mathrm{C}^{4-}$ anions but forms covalent compounds.

What is meant by functional group in carbon compounds ? Write in tabular form the structural formula and the functional group present in the following compounds :

Ethanol

Ethanoic acid