Question
Match column A and column B and choose the right code :
| Column A | Column B |
| 1. $S _2 O _3{ }^{2-}$ | (a) $-\frac{1}{3}$ |
| 2. Maximum oxidation number of chlorine | (b) $+2$ |
| 3. Oxidation number of N in $N _3 H$. | (c) Oxidation number of $S$ is -2 . |
| 4. Oxidation number of oxygen in $OF _2$ | (d) $+6$ |