JEE MAIN - Chemistry (2020 - 7th January Morning Slot - No. 20)
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
Explanation
Potasisum has an oxidation of +1 (only) in
combined state.
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