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Question

Can PCl5 act as an oxidising as well as a reducing agent? Justify.

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Solution

In PCl5, P has +5 oxidation state.

Phosphorous can show maximum oxidation state of +5. It cannot increase its oxidation state beyond +5. Hence, PCl5 is not a reducing agent. PCl5 is an oxidizing agent as P can decrease oxidation state from +5 to +3. Thus, PCl5 oxidizes Ag to AgCl.

It also oxidizes Sn to SnCl4.

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