Question

All members of a homologous series have the same :

• A. chemical formula.
• B. empirical formula.
• C. boiling point.
• D. melting point.

Answer 1

The correct option is B empirical formula.

Homologous series differ by a $C{H}_2$ group. It has a mass of 14 units. They can be represented by a common general formula for alkanes, alkenes, alkynes, and other functional groups. They can thus, be represented by a common empirical formula.

For example alkanes has empirical formula $C_n{H}_{2n+2}$ and for alkenes it is $C_n{H}_{2n}$ etc.

Hence, option $B$ is correct.