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Per NCERT §7.3 (rule 3), the oxidation number of oxygen in a normal PEROXIDE (e.g. H₂O₂, Na₂O₂) is which?
A0
B−2
C+1
D−1
Answer & Solution
Correct answer: D. −1
NCERT §7.3 rule 3: peroxides have O–O bond; each O is −1. Normal compound: O is −2.
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