Q.26 HNO2 acts as oxidant & reductant. Why?
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Explanation:
In other words, HNO3 can be reduced only and hence acts as an oxidizing agent only. => In HNO2, oxidation state of nitrogen is +3. Thus oxidation state of nitrogen present in HNO2 can be increased or decreased and hence it can act as an oxidizing agent or as a reducing agent.
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Answer:
The oxidation number of nitrogen in HNO3 can only decrease; thus it acts as an oxidising agent. In HNO2, the oxidation number of nitrogen is +3. Thus, it can increase or decrease within the range −3 to +5. Hence, it can act as an oxidising as well as a reducing agent.
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