State whether the compounds shown in bold letters are oxidised or reduced. Provide reasons also.
`CuO+H_2 to Cu+H_2O`

Explanation

To determine whether the compounds in bold letters (CuO and H2) are oxidized or reduced in the reaction \( \text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O} \), we need to analyze the oxidation states of the elements involved in the reaction.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- Reactants: Copper oxide (CuO) and Hydrogen (H2)
- Products: Copper (Cu) and Water (H2O)

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