1.

Which compounds acts as an oxidising as well as reducing agent?

Answer»

`SO_(2)`
`MgO_(2)`
`Al_(2)O_(3)`
`CrO_(3)`

SOLUTION :The minimum and maximum oxidation number of S are -2 and +6 respectively. Since the oxidation number of S in `SO_(2)` is +4. therefore it can be either increased or DECREASED. Therefore `SO_(2)` behaves both as an OXIDISING as well as REDUCING agent.


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