| Column-$I$ | Column-$II$ |
|---|---|
| $A$. $\underline{N}H_4 Cl$ | $P$. $+1$ |
| $B$. $H\underline{N}O_3$ | $Q$. $+5$ |
| $C$. $\underline{N}_2 O$ | $R$. $-3$ |
| $D$. $\underline{N}H_2 OH$ | $S$. $-1$ |
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