Which of the following can act as both oxidizing and reducing agent i) SO2 ii) HNO3 iii) HNO2 iv) HClO4

Compound Oxidation state of element Least and highest Oxidation state of the element Conclusion SO2 +4 -2,+6 Can undergoes both oxidation and reduction HNO3 +5 -3,+5 Can undergoes reduction only HNO2 +3 -3,+5 Can undergoes both oxidation and reduction HClO4 +7 -1,+7 Can undergoes only reduction

Which of the following can act as both oxidizing and reducing agent i) SO2 ii) HNO3 iii) HNO2 iv) HClO4

Compound Oxidation state of element Least and highest Oxidation state of the element Conclusion SO2 +4 -2,+6 Can undergoes both oxidation and reduction HNO3 +5 -3,+5 Can undergoes reduction only HNO2 +3 -3,+5 Can undergoes both oxidation and reduction HClO4 +7 -1,+7 Can undergoes only reduction

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Which of the following can act as both oxidizing and reducing agent
i) SO₂
ii) HNO₃
iii) HNO₂
iv) HClO₄

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SO₂, HNO₂

HNO₂, HNO₃

HNO₂, HClO₄

HClO₄, SO₂

answer is A.

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Detailed Solution

Compound	Oxidation state of element	Least and highest Oxidation state of the element	Conclusion
SO₂	+4	-2,+6	Can undergoes both oxidation and reduction
HNO₃	+5	-3,+5	Can undergoes reduction only
HNO₂	+3	-3,+5	Can undergoes both oxidation and reduction
HClO₄	+7	-1,+7	Can undergoes only reduction