Which of the following chlorides are water soluble ?

Options

A. `AgCl`
B. `Hg_(2)Cl_(2)`
C. `HgCl_(2)`
D. `NaCl`

Answer

To determine which of the given chlorides are water soluble, we can analyze each option based on general solubility rules for chlorides:

1. **AgCl (Silver Chloride)**:
- Silver chloride is known to be insoluble in water. It does not dissociate significantly when added to water.

2. **Hg2Cl2 (Mercurous Chloride)**:
- Mercurous chloride is also insoluble in water. Similar to silver chloride, it does not dissolve well in water.

3. **HgCl2 (Mercuric Chloride)**:
- Mercuric chloride is soluble in water. It dissociates completely in water, making it a good electrolyte.

4. **NaCl (Sodium Chloride)**:
- Sodium chloride is highly soluble in water. It dissociates completely into sodium and chloride ions when dissolved.

Based on this analysis, the water-soluble chlorides from the options provided are HgCl2 and NaCl.

### Summary of Solubility:
- **AgCl**: Insoluble
- **Hg2Cl2**: Insoluble
- **HgCl2**: Soluble
- **NaCl**: Soluble

### Final Answer:
The chlorides that are water soluble are **HgCl2 and NaCl**.

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