In depression of freezing point method camphor is a suitable solvent as its

Options

A. `K_(f)` is high
B. Sublimation is easier
C. Volatility is large
D. Density is low

Answer

To determine why camphor is a suitable solvent in the depression of freezing point method, we can analyze the options provided and understand the underlying principles of colligative properties.

### Step-by-Step Solution:

1. **Understanding Depression of Freezing Point**:
- The depression of freezing point (\( \Delta T_f \)) is a colligative property, which means it depends on the number of solute particles in a solution rather than their identity.
- The formula for depression of freezing point is given by:
\[ \Delta T_f = K_f \times m \]
where:
- \( \Delta T_f \) = depression in freezing point
- \( K_f \) = molal depression constant of the solvent
- \( m \) = molality of the solution

2. **Identifying the Importance of \( K_f \)**:
- The value of \( K_f \) is crucial because a higher \( K_f \) means a greater depression in freezing point for a given molality of solute.
- Therefore, a solvent with a high \( K_f \) will allow for easier determination of molar mass through freezing point depression experiments.

3. **Evaluating the Options**:
- **Option 1**: "KF is high" - This is true. Camphor has a high \( K_f \), making it a suitable solvent for this method.
- **Option 2**: "Sublimation is easier" - This is incorrect because sublimation does not relate to freezing point depression.
- **Option 3**: "Volatility is large" - This is also incorrect. While volatility is a property of the solvent, it does not directly affect the freezing point depression.
- **Option 4**: "Density is low" - This is not relevant to freezing point depression.

4. **Conclusion**:
- The correct answer is that camphor is a suitable solvent because its \( K_f \) is high, which enhances the ability to measure the depression in freezing point effectively.

### Final Answer:
Camphor is a suitable solvent in the depression of freezing point method because its \( K_f \) is high.

---