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  4. In a reaction KCl is converted into KClO 4.Change in oxidation number is

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Q. In a reaction $KCl$ is converted into $KClO _4$.Change in oxidation number is

General Principles and Processes of Isolation of Elements

Solution:

$\underset{\overset{\uparrow}{-1}}{KCl} \rightarrow \underset{\overset{\uparrow}{+7}}{KClO _4}$
Change $= 7 − (−1) = 8$