The catalyst used in the Deacon's process for the manufacture of chlorine is

Options

A. Cu
B. An alloy of copper
C. `CuCI_(2)`
D. CuS

Answer

**Step-by-Step Solution:**

1. **Understanding the Deacon's Process**: The Deacon's process is a method used for the manufacture of chlorine gas (Cl2) from hydrochloric acid (HCl) and oxygen (O2).

2. **Identifying the Reaction**: The reaction involved in the Deacon's process can be represented as:
\[ 4 \text{HCl} + \text{O}_2 \rightarrow 2 \text{Cl}_2 + 2 \text{H}_2\text{O} \]
This shows that hydrochloric acid reacts with oxygen to produce chlorine gas and water.

3. **Role of the Catalyst**: A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. In the Deacon's process, a specific catalyst is required to facilitate the reaction.

4. **Identifying the Catalyst**: According to the information provided, the catalyst used in the Deacon's process is cupric chloride (CuCl2). This catalyst helps in the oxidation of hydrochloric acid at a temperature of approximately 723 K.

5. **Conclusion**: Therefore, the catalyst used in the Deacon's process for the manufacture of chlorine is CuCl2.

**Final Answer**: The catalyst used in the Deacon's process for the manufacture of chlorine is CuCl2.

---