What is the function of fractionating column in fractional distillation?

Explanation

### Step-by-Step Solution:

1. **Understanding Fractional Distillation**:
- Fractional distillation is a method used to separate liquids based on their different boiling points. It is particularly useful for separating mixtures of liquids that have close boiling points.

2. **Role of the Fractionating Column**:
- The fractionating column is a key component in fractional distillation. Its primary function is to obstruct the upward movement of vapor from the boiling liquid.

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