Which one of two , `ClO_(2)^(-) ` or `ClO_(4)^(-)` shows disproportionation reaction and why ?

Explanation

To determine which of the two species, \( \text{ClO}_2^{-} \) or \( \text{ClO}_4^{-} \), shows disproportionation, we need to analyze their oxidation states and the concept of disproportionation reactions.

### Step-by-Step Solution:

1. **Understanding Disproportionation**:
Disproportionation is a type of redox reaction where the same element is simultaneously oxidized and reduced. This means that one part of the element increases its oxidation state (is oxidized) while another part decreases its oxidation state (is reduced).

2. **Determine Oxidation States**:
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