A student mixed a small amount of iron filings and sulphur powder in a dish. He could not affect the separation by simple hand picking. Which liquid will you suggest to effect the separation?

Options

A. Carbon disulphide
B. Cold water
C. Boiling water
D. Kerosene

Explanation

To solve the problem of separating iron filings and sulfur powder, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Mixture**:
- The mixture consists of iron filings and sulfur powder. We need to find a method to separate these two substances.

2. **Identifying Properties**:
- Iron filings are metallic and generally do not dissolve in liquids.
- Sulfur powder, on the other hand, has different solubility properties depending on the solvent used.

3. **Choosing a Suitable Solvent**:
- We need to select a liquid that can dissolve sulfur but not iron.
- Carbon disulfide (CS2) is known to dissolve sulfur while leaving iron filings undissolved.

4. **Separation Process**:
- By adding carbon disulfide to the mixture, the sulfur will dissolve in the liquid, while the iron filings will remain solid.
- After mixing, we can filter the solution. The iron filings will be left on the filter paper, and the sulfur will be in the carbon disulfide solution.

5. **Conclusion**:
- The best liquid to suggest for separating iron filings from sulfur powder is carbon disulfide.

### Final Answer:
The liquid suggested for the separation of iron filings and sulfur powder is **carbon disulfide**.

---