Question

$C{H}_4$ and $C_2{H}_6$ form a homologous series, they differ by a

• A. $-C{H}_4-unit$
• B. $-C{H}_2-unit$
• C. $-CH-unit$
• D. $-C{H}_3-unit$

Answer 1

The correct option is B $-C{H}_2-unit$

A homologous series is a series of compounds with same chemical properties due to the presence of the same functional group, usually varying by a single parameter, such as the length of a carbon chain. In this case, they differ by $C{H}_2$ unit.