1.

Which of the following acts as both oxidant and reductant -

Answer»

`HNO_(3)`
`HNO_(2)`
Both `HNO_(3)` & `HNO_(2)`
Neither `HNO_(3)` nor `HNO_(2)`

Solution :O.N. of N in `HNO_(2)` is `+ 3`
Max. O.N.Of N is `+5`
Min. O.N. of N is -3
Thus O.N. of N in `HNO_(2)` can show an increase or decrease as the CASE may be. That is why `HNO_(2)` acts as oxidant and reductant both. O.N. of N in `HNO_(3)` is `+ 5`. Hence it can act only as an oxidant.


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