Do the following conversion. ( Try to minimize the steps involved )
2-chlorobutanoic acid to 3-chlorobutanoic acid

Explanation

To convert 2-chlorobutanoic acid to 3-chlorobutanoic acid, we can follow these steps:

### Step 1: Dehydrohalogenation of 2-chlorobutanoic acid
- **Reaction**: Treat 2-chlorobutanoic acid with alcoholic potassium hydroxide (KOH).
- **Mechanism**: The alcoholic KOH will facilitate the elimination of HCl from 2-chlorobutanoic acid, resulting in the formation of a double bond between the second and third carbon atoms.
- **Product**: This reaction yields but-2-enoic acid (CH3CH=CHCOOH).

### Step 2: Hydrohalogenation of but-2-enoic acid
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