Question

Which of the following constitute a pair of homologous?

• A. 1-butanol, butanal
• B. 2-butanol, 2-propanol
• C. sec-butyl alcohol, n-butyl alcohol
• D. sec-butyl alcohol, t-butyl alcohol

Answer 1

The correct option is B 2-butanol, 2-propanol

Homologues differ by $-C{H}_2$ and belongs to same functional group that is alcohol.

Hence, 2-butanol and 2-propanol constitute a pair of homologues.

Option B is correct.