Explain that SO2 can act as an oxidising...

Explain that `SO_2` can act as an oxidising agent as well as a reducing agent, but `SO_3` can act as an oxidising agent only.

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The minimum oxidation state of Sis -2 while is maximum is +6.
In `SO_2` the oxidation state is S is +4, so it can be reduced +2 oxidation state or can be oxidised to +6 oxidation state. So it can cat as both as oxidising agent as well as reducing agent for example

But in `SO_3` of S is +6 i.e. the highest oxidation state therefore it can only decrease its oxidation state by gaining electron. As such it act only as an oxidising agent.

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Explain that `SO_2` can act as an oxidising agent as well as a reducing agent, but `SO_3` can act as an oxidising agent only.

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