How will you convert :
(iv) benzoic acid to m-bromobenzoic acid?

Explanation

To convert benzoic acid to m-bromobenzoic acid, we can follow these steps:

### Step 1: Understand the Reactants and Products
- **Starting Material**: Benzoic acid (C6H5COOH)
- **Target Product**: m-Bromobenzoic acid (C6H4BrCOOH)

### Step 2: Identify the Electrophilic Substitution Reaction
Benzoic acid has a carboxylic acid group (-COOH) attached to the benzene ring. This group is known to be a meta-directing group in electrophilic aromatic substitution reactions.
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