Write the molecular formula of first two members of homologous series having functional group-Br.

Explanation

To find the molecular formula of the first two members of the homologous series with the functional group -Br (bromine), we can follow these steps:

### Step 1: Understand the Homologous Series
A homologous series is a group of organic compounds that have the same functional group and similar chemical properties, with each successive member differing by a CH2 unit. The general formula for alkanes is CnH2n+2, but since we are considering compounds with a bromine functional group, we will adjust the formula accordingly.

### Step 2: Determine the General Formula
For compounds with a bromine functional group, the general formula can be expressed as:
\[ \text{C}_n\text{H}_{2n+1}\text{Br} \]
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