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Question

Which of the following in each pair acts as oxidant or reductant or both?

A
HNO3 and HNO2
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B
NH3 and Cl2
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C
CO and CO2
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D
NO and N2O5
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Solution

The correct options are
A NH3 and Cl2
B CO and CO2
C HNO3 and HNO2
D NO and N2O5
Oxidant:HNO3,CO2,N2O5
+5 +4 +5
As they are in highest oxidation state and have tendency to reduce so, they acts as oxidants.
Reductant:NH3
-3
Both:HNO2,CO,NO,Cl2
+3 +2 +2 0
As they are in intermediate oxidation state so, they can act as both.

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