How is acetic acid converted to formic acid ? 

Explanation

To convert acetic acid (CH₃COOH) to formic acid (HCOOH), we can follow a series of chemical reactions. Here is a step-by-step breakdown of the process:

### Step 1: Decarboxylation of Acetic Acid
- **Reaction**: Acetic acid (CH₃COOH) is treated with sodium hydroxide (NaOH) or calcium hydroxide (Ca(OH)₂) to facilitate the removal of one carbon atom.
- **Result**: This process leads to the formation of methane (CH₄).

### Step 2: Halogenation of Methane
- **Reaction**: The methane produced is then treated with chlorine (Cl₂) in the presence of sunlight (light).
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