Which method can be applied to separate a mixture of camphor and benzoic acid?

Options

A. Sublimation
B. Chemical methods
C. Crystallisation
D. Extraction with solvent

Answer

To separate a mixture of camphor and benzoic acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Properties**:
- Camphor is a solid that can sublimate, meaning it can transition directly from a solid to a gas without becoming liquid.
- Benzoic acid is a solid that is less volatile and does not sublime under normal conditions.

2. **Applying Heat**:
- Heat the mixture of camphor and benzoic acid. This will cause the camphor to sublimate, leaving the benzoic acid behind.

3. **Collection of Sublimed Camphor**:
- As the camphor sublimates, it will turn into gas and can be collected by cooling it down. This can be done using a cold surface or a condenser, where the gas will turn back into solid camphor.

4. **Separation of Benzoic Acid**:
- After the camphor has been removed, the remaining benzoic acid can be separated through crystallization. Since benzoic acid is less soluble in cold water, it can be dissolved in hot water and then cooled to allow crystals to form.

5. **Filtration**:
- Finally, filter the solution to collect the benzoic acid crystals from the solution.

### Summary of the Methods Used:
- **Sublimation**: To separate camphor.
- **Crystallization**: To separate benzoic acid.

### Final Answer:
The method that can be applied to separate a mixture of camphor and benzoic acid is sublimation for camphor and crystallization for benzoic acid.

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