How will you prepare benzaldehyde from toluene?

Explanation

To prepare benzaldehyde from toluene, we can follow these steps:

### Step-by-Step Solution:

1. **Starting Material**: Begin with toluene (C6H5CH3), which is the alkyl-substituted benzene.

2. **Chlorination of Toluene**: React toluene with chlorine (Cl2) in the presence of a catalyst (such as FeCl3) to perform a chlorination reaction. This will replace one of the hydrogen atoms in the methyl group (–CH3) with a chlorine atom, forming benzyl chloride (C6H5CH2Cl).

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