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Statement I : HNO₂ acts both as an oxidising as well as a reducing agent.
Statement II : The Oxidation number of Nitrogen can increase above +3 and can also decrease below +3

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Statement I and statement II are correct

Statement I is correct and II is incorrect

Statement I is incorrect and statement II is correct

Statement I&II are incorrect

answer is A.

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Detailed Solution

I) Oxidation statement of 'N' in HNO₂ = +3
'+3' is the intermediate oxidation state of nitrogen.

HNO₂ can act like both oxidant and reductant
It can undergo reduction, +3 state to lower ox.state
It can undergo oxidation, +3 state to higher ox.state

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