Practical Chemistry Question 1
Question 1 - 25 January - Shift 1
Match the List-I with List-II :
| Cations | Group reaction |
|---|---|
| $P \to Pb^{2+}, Cu^{2+}$ | (i) $H_2 S$ gas in presence of dilute $HCl$ |
| $Q \to Al^{3+}, Fe^{3+}$ | (ii) $(NH_4)_2 CO_3$ in presence of $NH_4 OH$ |
| $R \to Co^{2+}, Ni^{2+}$ | (iii) $NH_4 OH$ in presence of $NH_4 CI$ |
| $S \to Ba^{2+}, Ca^{2+}$ | (iv) $H_2 S$ in presence of $NH_4 OH$ |
(1) $P \to$ i, Q $\to$ iii, $R \to$ ii, $S \to$ iv
(2) $P \to iv, Q \to$ ii, $R \to$ iii, $S \to i$
(3) $P \to$ iii, Q $\to$ i, $R \to$ iv, $S \to$ ii
(4) $P \to i, Q \to$ iii, $R \to iv, S \to$ ii
Show Answer
Answer: (4)
Solution:
Formula: Detection Test
| Cations | Group No. | Group reagent |
|---|---|---|
| $Pb^{+2}, Cu^{+2}$ |
II | $H_2 S(g)$ in presence of dilHCl |
| $Al^{+3}, Fe^{+3}$ | III | $NH_4 OH$ in presence of $NH_4 Cl$ |
| $CO^{+2}, Ni^{+2}$ | IV | $H_2 S$ in presence of $NH_4 OH$ |
| $Ba^{+2}, Ca^{+2}$ | V | $(NH_4)_2 CO_3$ in presence of $NH_4 OH$ |
