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Common Oxidation States

A mixture of ...

Question

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

A

S

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B

H

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C

Cl

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D

C

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Solution

The correct option is C Cl
$K C l O_{3} + H_{2} C_{2} O_{4} + H_{2} S O_{4} \to K_{2} S O_{4} + K C l + C O_{2} + H_{2} O$
Maximum change in oxidation number is observed in Cl (+5 to –1)

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