A mixture of two volatile liquids having little difference in their boiling points can be purified by

Options

A. Distillation
B. Crystalization
C. Column chromatography
D. Fractional distillation

Answer

To solve the question regarding the purification of a mixture of two volatile liquids with little difference in their boiling points, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Mixture**:
- We have a mixture of two volatile liquids. Volatile liquids are those that have a high vapor pressure and can easily evaporate.

**Hint**: Consider the properties of volatile liquids and how they behave when heated.

2. **Identifying the Boiling Points**:
- The problem states that the boiling points of the two liquids are close to each other. This is crucial because it affects the method we can use for separation.

**Hint**: Recall that the boiling point is the temperature at which a liquid turns into vapor.

3. **Evaluating Purification Methods**:
- The options provided are:
1. Distillation
2. Crystallization
3. Column chromatography
4. Fractional distillation

**Hint**: Think about which method is best suited for separating components based on their boiling points.

4. **Choosing the Right Method**:
- **Distillation** is generally used for separating liquids with significantly different boiling points.
- **Crystallization** is used for purifying solid compounds, not suitable for liquids.
- **Column chromatography** can separate mixtures but is not specifically designed for volatile liquids.
- **Fractional distillation** is specifically designed for separating mixtures of liquids that have close boiling points (typically less than 25°C apart).

**Hint**: Fractional distillation uses a fractionating column to separate liquids based on their boiling points, allowing for effective separation even when the boiling points are close.

5. **Conclusion**:
- Therefore, the correct method to purify a mixture of two volatile liquids with little difference in their boiling points is **fractional distillation**.

### Final Answer:
The mixture of two volatile liquids having little difference in their boiling points can be purified by **fractional distillation**.

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