The Mond process is used for the:

Options

A. Purification of `Ni`
B. extraction of Mo
C. Purification of `Zr` and `Ti`
D. extraction of `Zn`

Answer

### Step-by-Step Solution:

1. **Understanding the Mond Process**: The Mond process is a method used for the purification of nickel. It involves the formation of a volatile compound of nickel.

2. **Heating Impure Nickel**: In the first step of the Mond process, impure nickel is heated with carbon monoxide (CO) at a temperature range of 330 to 350 Kelvin. This reaction produces nickel tetracarbonyl (Ni(CO)₄), which is a volatile compound.

\[ \text{Impure Ni} + 4 \text{CO} \rightarrow \text{Ni(CO)}_4 \]

3. **Decomposition of Nickel Tetracarbonyl**: The nickel tetracarbonyl (Ni(CO)₄) is then subjected to a higher temperature, typically between 450 to 470 Kelvin. Under these conditions, Ni(CO)₄ decomposes to yield pure nickel and carbon monoxide.

\[ \text{Ni(CO)}_4 \rightarrow \text{Ni (pure)} + 4 \text{CO} \]

4. **Final Product**: The end result of the Mond process is the production of pure nickel, which can be collected and used for various applications.

5. **Conclusion**: Therefore, the correct answer to the question is that the Mond process is used for the purification of nickel.

### Final Answer:
The Mond process is used for the **purification of nickel**.

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