Question

Which series contains compounds differing by a $ -CH_2 - $ unit?

• A. Homologous series
• B. Isomeric series
• C. Saturated series
• D. Ionic series

Hint:

Homologous series: Constant difference of \( -CH_2 - \) between members.

Answer 1

The Correct Option is A

Step 1: Define homologous series.
A homologous series is a sequence of organic compounds with the same functional group where successive members differ by a \( -CH_2 - \) unit.
Step 2: Define other terms.
Isomeric series: Compounds with the same molecular formula but different structures.
Saturated series: Compounds with only single carbon-carbon bonds.
Ionic series: Not a standard term for organic compounds based on structure.
Step 3: Match the definition to the question.
The question describes the defining characteristic of a homologous series.