How will you bring about following conversion : Formic acid to oxalic acid ?

Explanation

To convert formic acid (HCOOH) to oxalic acid (COOH)₂, we can follow a series of chemical reactions. Here’s a step-by-step breakdown of the process:

### Step 1: Chlorination of Formic Acid
1. **Starting Material**: Begin with formic acid (HCOOH).
2. **Reagent**: React formic acid with chlorine (Cl₂) in the presence of ultraviolet light (hv).
3. **Reaction**: The hydrogen atom in formic acid is replaced by a chlorine atom, resulting in the formation of chlorformic acid (ClCOOH).

**Chemical Equation**:
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