White phosphorus can be separeted from red phosphorus by :

Options

A. sublimation
B. dissolving in `CS_(2)`
C. distillation
D. none of these

Explanation

To solve the question of how white phosphorus can be separated from red phosphorus, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Properties of Phosphorus Forms**:
- White phosphorus (P4) is a waxy solid that is highly reactive and can dissolve in certain solvents.
- Red phosphorus is a more stable, amorphous form of phosphorus that does not dissolve in the same solvents.

2. **Identifying the Separation Method**:
- One common method to separate white phosphorus from red phosphorus is through solubility differences.
- White phosphorus can dissolve in carbon disulfide (CS2) and carbon tetrachloride (CCl4), while red phosphorus does not dissolve in these solvents.

3. **Evaluating the Options**:
- **Option 1: Sublimation** - This method is not applicable here as both forms do not sublime under normal conditions.
- **Option 2: Dissolving in CS2** - This is a correct method since white phosphorus dissolves in CS2 while red phosphorus does not.
- **Option 3: Distillation** - This method is not suitable for separating these two forms of phosphorus.
- **Option 4: None of these** - This option is incorrect as we have identified a valid method.

4. **Conclusion**:
- The correct answer is **Option 2: Dissolving in CS2**.

### Final Answer:
White phosphorus can be separated from red phosphorus by **dissolving in CS2**.