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Q.

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

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a

SO2, HNO2

b

HNO2, HNO3

c

HNO2, HClO4

d

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

 

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