Complete the reaction :
`CH_(2)=CH_(2) overset("alk." KMnO_(4)) to`

Explanation

To complete the reaction of ethene (CH₂=CH₂) with alkaline KMnO₄, we will follow a systematic approach to understand the mechanism and the resulting product.

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactant is ethene (CH₂=CH₂) and the reagent is alkaline KMnO₄.

2. **Mechanism Initiation**:
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