MCQ
Oxidation number of oxygen in ${O_2}$ molecule is
- A$+1$
- ✓$0$
- C$+2$
- D$-2$
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$I . C H_{3}^{+}$ $II.$ $H_{3} O ^{+}$ $III.$ $N H_{3}$ $I V\,\, C H_{3}^{-}$
