Question

Phenol and benzyl alcohol are:

• A. functional isomers
• B. homologous
• C. position isomers
• D. none of these

Answer 1

Answer: (B)

homologous

Phenol is $C_6{H}_5\left(OH\right)$ while benzyl alcohol is $C_6{H}_5\left(C{H}_{2}OH\right)$.

Here there is a difference of $-H{C}_2$ between their molecular formula.

According to the definition of homologous series, the adjacent members of the series differ by $-C{H}_2$ group.

Thus Phenol and benzyl alcohol are homologous of each other.