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HNO(2) acts as...

`HNO_(2)` acts as

A

oxidising agent

B

reducing agent

C

both `(a)` and `(b)`

D

its solution is stable

Text Solution

Verified by Experts

The correct Answer is:
C
Nitrous acid behaves as a reducing as well as an oxidising agent. It reduces potassium permanganate, potassium dichromate, `H_(2)O_(2)` and other strong oxidising agents. It oxidises strong reducing agents such as hydroiodic acid, sulphurous acid etc.
It oxidises `Fe^(+2)` into `Fe^(+3)` in acidic medium,
`Fe^(+2)+HNO_(2)+H^(+)rarrFe^(+3)+NO+H_(2)O`
It reduces acidified `KMnO_(4)`.
`2KMnO_(4)+3H_(2)SO_(4)+5HNO_(2)rarrK_(2)SO_(4)+2MnSO_(4)+3H_(2)O+5HNO_(3)`
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