Question

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C{H}_2$ - group.

• A. Both ASSERTION REASON are correct and REASON is the correct explanation for ASSERTION
• B. Both ASSERTION REASON are correct but REASON is not the correct explanation for ASSERTION
• C. ASSERTION is correct but REASON is incorrect
• D. Both ASSERTION REASON are incorrect.

Answer 1

Answer: (A)

Both ASSERTION REASON are correct and REASON is the correct explanation for ASSERTION

Here we have alkanes that differ by one -$C{H}_2$- (methylene) in molecular formula/weight. The subsequent homologues of alkanes differ by a -$C{H}_2$-. Thus the reason explains the assertion.