Identify the substances that are oxidised and the substances that are reduced in the following reactions.
`CuO(s) +H_(2)(g) to Cu(s) +H_(2)O (l)`

Explanation

To identify the substances that are oxidized and reduced in the reaction:

**Reaction:**
\[ \text{CuO(s)} + \text{H}_2(g) \rightarrow \text{Cu(s)} + \text{H}_2\text{O(l)} \]

### Step-by-Step Solution:

1. **Identify the Reactants and Products:**
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