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Mention whether each of the following co...

Mention whether each of the following conversion involves oxidation or reduction.
a) `HCl rarr HOCl,` b) `KMnO_(4)rarrK_(2)MnO_(4)` and c) `HNO_(3)rarr NaNO_(3)`

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(a) oxidation number of Cl in HCl is -1 and in HOCl is +1.
The conversion involves oxidation.
(b) Oxidation number of Mn in `KMnO_(4)` +7 and in `K_(2)MnO_(4)` is +6.
The conversion involves reduction.
(c) Oxidation number of N in `HNO_(3)` is +5 and in `NaNO_(3)` is +5
The conversion involves neither oxidation nor reduction. It involves no electron transfer.
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