JEE MAIN - Chemistry (2023 - 25th January Morning Shift - No. 13)
Match the List-I with List-II :
| List-I Cations |
List-II Group reagents |
||
|---|---|---|---|
| A. | $$\mathrm{Pb^{2+},Cu^{2+}}$$ | i) | $$\mathrm{H_2S}$$ gas in presence of dilute HCl |
| B. | $$\mathrm{Al^{3+},Fe^{3+}}$$ | ii) | $$\mathrm{(NH_4)_2CO_3}$$ in presence of $$\mathrm{NH_4OH}$$ |
| C. | $$\mathrm{Co^{2+},Ni^{2+}}$$ | iii) | $$\mathrm{NH_4OH}$$ in presence of $$\mathrm{NH_4Cl}$$ |
| D. | $$\mathrm{Ba^{2+},Ca^{2+}}$$ | iv) | H2S in presence of NH4OH |
Correct match is -
A $$\to$$ i, B $$\to$$ iii, C $$\to$$ iv, D $$\to$$ ii
A $$\to$$ i, B $$\to$$ iii, C $$\to$$ ii, D $$\to$$ iv
A $$\to$$ iii, B $$\to$$ i, C $$\to$$ iv, D $$\to$$ ii
A $$\to$$ iv, B $$\to$$ ii, C $$\to$$ iii, D $$\to$$ i
Explanation
| Cations | Group No. | Group reagent |
|---|---|---|
| $\mathrm{Pb}^{+2}, \mathrm{Cu}^{+2}$ | II | $\mathrm{H}_2 \mathrm{S}(\mathrm{g}) \text { in presence of } \text { dil HCl }$ |
| $\mathrm{Al}^{+3}, \mathrm{Fe}^{+3}$ | III | $\begin{aligned} & \mathrm{NH}_4 \mathrm{OH} \text { in presence of } \\ & \mathrm{NH}_4 \mathrm{Cl}\end{aligned}$ |
| $\mathrm{CO}^{+2}, \mathrm{Ni}^{+2}$ | $\mathrm{IV}$ | $\begin{aligned} & \mathrm{H}_2 \mathrm{~S} \text { in presence of } \\ & \mathrm{NH}_4 \mathrm{OH}\end{aligned}$ |
| $\mathrm{Ba}^{+2}, \mathrm{Ca}^{+2}$ | $\mathrm{~V}$ | $\begin{aligned} & \left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3 \text { in presence } \\ & \text { of } \mathrm{NH}_4 \mathrm{OH}\end{aligned}$ |
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