Impure glycerol decomposes at a temperature below its boiling point. How will you purify it ?

Explanation

To purify impure glycerol that decomposes at a temperature below its boiling point, we can use the method of distillation under reduced pressure. Here’s a step-by-step explanation of the process:

### Step-by-Step Solution:

1. **Understanding the Problem**:
- Impure glycerol decomposes at a temperature lower than its boiling point, making traditional distillation ineffective for purification since it would decompose before reaching the boiling point.

2. **Choosing the Right Method**:
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