Discuss the chemistry of the following reagents in the refining of metals. (i) CO and (ii) ` I_ 2 `

Explanation

### Step-by-Step Text Solution:

**1. Introduction to Refining of Metals:**
Refining of metals is a crucial process in metallurgy that involves the purification of metal ores to obtain pure metals. Different reagents are used in various processes to achieve this purification.

**2. Role of Carbon Monoxide (CO) in the Mond Process:**
- **Process Overview:** The Mond process is specifically used for the refining of nickel. In this process, carbon monoxide (CO) plays a vital role.
- **Reaction at Low Temperature:** Initially, impure nickel is reacted with carbon monoxide at low temperatures. The reaction can be represented as:
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