How will you bring about the following conversions ? '4-nitrobenzaldehyde from benzene'

Explanation

To convert benzene to 4-nitrobenzaldehyde, we can follow these steps:

### Step 1: Friedel-Crafts Alkylation
1. **React benzene with methyl chloride (CH3Cl)** in the presence of **aluminum chloride (AlCl3)** as a catalyst.
- This reaction introduces a methyl group (CH3) to the benzene ring, resulting in the formation of **toluene (C6H5CH3)**.
- The reaction can be represented as:
\[
\text{C}_6\text{H}_6 + \text{CH}_3\text{Cl} \xrightarrow{\text{AlCl}_3} \text{C}_6\text{H}_5\text{CH}_3
...