Explain the following in terms of gain or loss of oxygen with two examples each.
Oxidation

Explanation

### Step-by-Step Text Solution:

**Definition of Oxidation:**
Oxidation is a chemical process in which a substance gains oxygen or loses hydrogen. It can also be defined as the increase in oxidation state of an element. In simpler terms, when a substance combines with oxygen, it undergoes oxidation.

**Examples of Oxidation:**

1. **Example 1: Oxidation of Copper**
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