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?

`Cl`

`C`

`S`

`H`

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The correct Answer is:

`overset(+5)(KCIO_3) + oveset(+3)(H_2 C_2 O_4) + H_2 SO_4 to overset(+4)(CO_2) + overset(+4)(CIO_2) + overset(+7)(HCIO_4) + KHSO_4 +H_ 2O`

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