Identify the type of reaction from the following equations:
(i) `CH_(4)+2O_(2)rarr CO_(2)+2H_(2)O " (ii) Pb(NO_(3))_(2) + 2KI rarr PbI_(2)+2KNO_(3)`
`(iii) CaO+H_(2)Orarr rarr Ca(OH)_(2) " (iv) CuSO_(4)+Znrarr ZnSO_(4) + Cu`

Explanation

To identify the type of reaction for each of the given equations, we will analyze each equation step by step.

### Step-by-Step Solution:

**(i) CH₄ + 2O₂ → CO₂ + 2H₂O**

1. **Identify Reactants and Products**: The reactants are methane (CH₄) and oxygen (O₂), and the products are carbon dioxide (CO₂) and water (H₂O).
2. **Oxidation States**:
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