A mixture of potassium chlorate ,oxalic ...

A mixture of potassium chlorate ,oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number -

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The correct Answer is:

Reaction `overset(+5)(kCIO_(3))+H_(2)overset(+6)(S)O_(4)toK_(2)SO_(4)+overset(+4)CO_(2)+KCoverset(-1)I+H_(2)O`
In this reaction ,the oxidation number of CI decreases from +5 to -1 (6 unit ) . So the change in oxidation number of CI is maxium .

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