Which pairs represent conjugate pair of oxidant-reductant or reductant-oxidant in 2ClO2+5H2O2+2OH−→2Cl−+5O2+6H2O. I. ClO2 and Cl− II. H2O2 and O2 III. Cl4+ and Cl− IV. Cl5+ and Cl−
A
I, II, III
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B
I, II, IV
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C
I, II
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D
II, III, IV
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Solution
The correct option is A I, II, III 2ClO2+5H2O2+2OH−→2Cl−+5O2+6H2O +4 -1 -1 0 Cl4+ and ClO2 is oxidant with conjugate reductant Cl−. O− in H2O2 is reductant with conjugate oxidant O2. Hence, I, II and III represent conjugate pair of oxidant-reductant or reductant-oxidant.