Consider the following salts :
`NaCl, Hg_2Cl_(2), CuCl_(2), CuCl` and `AgCl`
Identify the correct salts that are insoluble in water.

Options

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

Explanation

To solve the question of identifying which salts are insoluble in water from the given list (NaCl, Hg2Cl2, CuCl2, CuCl, and AgCl), we will analyze each salt based on its solubility properties.

### Step-by-Step Solution:

1. **Identify the Solubility of NaCl:**
- Sodium chloride (NaCl) is a well-known soluble salt. It dissolves readily in water due to its low lattice energy and high hydration energy.
- **Conclusion:** NaCl is soluble in water.

2. **Identify the Solubility of CuCl2:**
- Copper(II) chloride (CuCl2) is also soluble in water. Similar to NaCl, it has a favorable balance of lattice energy and hydration energy.
- **Conclusion:** CuCl2 is soluble in water.

3. **Identify the Solubility of CuCl:**
- Copper(I) chloride (CuCl) is less soluble in water compared to CuCl2. It has higher lattice energy and lower hydration energy, making it less favorable for dissolution.
- **Conclusion:** CuCl is insoluble in water.

4. **Identify the Solubility of AgCl:**
- Silver chloride (AgCl) is known to be insoluble in water. It has a high lattice energy that outweighs the hydration energy.
- **Conclusion:** AgCl is insoluble in water.

5. **Identify the Solubility of Hg2Cl2:**
- Mercury(I) chloride (Hg2Cl2), also known as calomel, is insoluble in water. It has a high lattice energy that prevents it from dissolving.
- **Conclusion:** Hg2Cl2 is insoluble in water.

### Final List of Insoluble Salts:
- CuCl
- AgCl
- Hg2Cl2

### Summary:
The salts that are insoluble in water from the given list are **CuCl, AgCl, and Hg2Cl2**.