Which is not correctly matched?

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Oxidation number of nitrogen in NH3 is -3

Oxidation number of Mg in MgF2 is +2

Oxidation number of nitrogen in N2O5 is +5

Oxidation number of K in K2O is +2

answer is D.

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Detailed Solution

Oxidation number of O is -2, so oxidation number of K has to be +1.

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