Chlorine undergoes disproportionation in alkaline medium as shown below:

The values of , , and in a balanced redox reaction are respectively:

Question

Chlorine undergoes disproportionation in alkaline medium as shown below:

The values of , ,  and  in a balanced redox reaction are respectively:

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Step 1 — Identify the half-reactions:

Oxidation: 
Cl:  (loss of 1e⁻ per Cl)

Reduction: 
Cl:  (gain of 1e⁻ per Cl)

Step 2 — Balance electrons:
Each  provides one Cl that gets oxidised (+1) and one that gets reduced (-1) → already balanced with 1 molecule of .

Step 3 — Balance atoms:

Check:
- Cl: 2 = 1 + 1 ✓
- O: 2 = 1 + 1 ✓
- H: 2 = 2 ✓
- Charge:  ✓

Values: , , ,

Answer: Option (1) — 1, 2, 1 and 1

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