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| Column-$I$ | Column-$II$ |
|---|---|
| $P$. $NaBr + \text{Conc. } H_2SO_4 \rightarrow$ | $A$. રંગહીન વાયુ |
| $Q$. $Na_2S + \text{dil. } HCl \rightarrow$ | $B$. કથ્થઈ રંગ |
| $R$. $NaNO_2 + \text{dil. } HCl \rightarrow$ | $C$. સડેલા ઈંડા જેવી ગંધ |
| $S$. $NaNO_3 + \text{Conc. } H_2SO_4 \rightarrow$ | $D$. પેરામેગ્નેટિક |
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