Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :

Question

Oxidation number of potassium in K₂O. K₂O₂ and KO₂ respectively is :

+1, +2 and + 4

+1, +1 and + 1

+2, +1 and $ + {1 \over 2}$

+1, +4, and +2

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