The compound that cannot act both as oxidizing and reducing agent is

Question

Canvas Classes · Accepted Answer

Step 1 — For a compound to act as both oxidising and reducing agent, the central atom must be in an intermediate oxidation state.

Step 2 — Check each compound:

| Compound | Element | Oxidation State | Can be oxidised? | Can be reduced? |
|---|---|---|---|---|
|  | P |  (maximum) | No (already max) | Yes | 
|  | N |  (intermediate) | Yes →  | Yes →  |
|  | S |  (intermediate) | Yes →  | Yes →  |
|  | O |  (intermediate) | Yes →  | Yes →  |

Step 3 — Conclusion:
: P is at its maximum oxidation s

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