Question

$C{H}_4$ and $C_2{H}_6$ belong to the same homologous series and they differ by a unit.

• A. $C{H}_3$
• B. $CH$
• C. $C{H}_2$

Answer 1

The correct option is C $C{H}_2$

Homologous series refer to a series of compounds that can be represented by a general formula. For example, alkanes $\left(C_n{H}_{2n+2}\right)$, alkenes $\left(C_n{H}_{2n}\right)$, etc.

Methane $\left(C{H}_4\right)$ and ethane $\left(C_2{H}_6\right)$ belong to the same homologous series. Each successive member in a homologous series differ by a $C{H}_2$ group.