Chloroform and benzene form a pair of miscible liquids. These can be separated by:

Options

A. Sublimation
B. Filtration
C. Separating funnel
D. Fractional distillation

Explanation

To separate a pair of miscible liquids like chloroform and benzene, we can use the method of fractional distillation. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding the Mixture**:
Chloroform (CHCl3) and benzene (C6H6) are both liquids that are miscible, meaning they mix completely in all proportions.

2. **Identifying the Properties**:
Both chloroform and benzene have different boiling points. Chloroform has a boiling point of approximately 61 °C, while benzene has a boiling point of about 80 °C. This difference in boiling points is crucial for separation.

3. **Choosing the Method**:
Since the two liquids are miscible and have different boiling points, fractional distillation is the appropriate method for separation. This technique is used to separate components of a mixture based on differences in their boiling points.

4. **Setting Up Fractional Distillation**:
In fractional distillation, a fractionating column is used. The mixture is heated, and as it reaches the boiling point of chloroform, it vaporizes first. The vapor rises through the fractionating column, which has a temperature gradient (cooler at the top, hotter at the bottom).

5. **Collecting the Distillates**:
As the vapor cools, it condenses back into a liquid. The chloroform will condense and can be collected in a separate container. The remaining liquid in the distillation flask will be benzene, which can be collected after the chloroform has been completely distilled off.

6. **Final Separation**:
By continuing to heat the mixture, benzene will eventually reach its boiling point and can be collected separately. Thus, both components can be effectively separated and collected.

### Final Answer:
The correct method to separate chloroform and benzene, which are miscible liquids, is **fractional distillation**.

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