Question

The $4^{th}$ higher homologue of ethane is

• A. Butane
• B. Pentane
• C. Hexane
• D. Heptane

Answer 1

Answer: (C)

Hexane

Answer 2

The molecular formula of ethane is $C _{2} H _{6}$. To get
its fourth homologue, we have to add $4 \times CH _{2}= C _{4} H _{8}$ to it.
$C _{2} H _{6}+ C _{4} H _{8}= C _{6} H _{14}$
$C _{6} H _{14}$ is the molecular formula of hexane. Thus, hexane is the fourth homologue of ethane.