Write a test to differentiate between pentan-2-one and pentan-3-one.

Explanation

To differentiate between pentan-2-one and pentan-3-one, we can use the iodoform test. Here’s a step-by-step solution:

### Step 1: Understand the Structures
- **Pentan-2-one** has the structure: CH3-CH2-CO-CH2-CH3
- **Pentan-3-one** has the structure: CH3-CH2-CH2-CO-CH3

### Step 2: Identify the Presence of Alpha-Hydrogens
- In pentan-2-one, the carbonyl carbon (C=O) is attached to two methyl groups (CH3) and one methylene group (CH2). This means it has three alpha-hydrogens (from the CH3 groups).
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