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a
NO2
b
MnO2
c
RbO2
d
BaO2
answer is D.
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Detailed Solution
→ RbO2 is super oxidesuper oxides contain O2-1 ionSuper oxides also possess M-O and O-O bondsThe oxidation number of oxygen in superoxides is -1/2Eg :- KO2 , RbO2 → NO2 , MnO2 are normal oxidesIn which oxidation number of O 1s (-2)Normal oxides contains "O-2 " ionNormal oxides contains only M-O bondsEg: