Match the List-I with List-II : Cations Group reaction P → Pb 2 + , Cu 2 + H 2 S gas in presence of dilute HCl Q → Al 3 + , Fe 3 + NH 4 2 CO 3 in presence of NH 4 OH R → Co 2 + , Ni 2 + NH 4 OH in presence of NH 4 CI S → Ba 2 + , Ca 2 + H 2 S in presence of NH 4 OH

Question

Match the List-I with List-II : Cations Group reaction P → Pb 2 + , Cu 2 + H 2 S gas in presence of dilute HCl Q → Al 3 + , Fe 3 + NH 4 2 CO 3 in presence of NH 4 OH R → Co 2 + , Ni 2 + NH 4 OH in presence of NH 4 CI S → Ba 2 + , Ca 2 + H 2 S in presence of NH 4 OH, P → i , Q → iii , R → ii , S → iv, P → iv , Q → ii , R → iii , S → i, P → iii , Q → i , R → iv , S → ii, P → i , Q → iii , R → iv , S → ii

MARKS App · Accepted Answer

Group reagents for precipitating ions: Group Cations Group reagent Zero NH 4 + None I Pb 2 + Dilute HCl II Pb 2 + , Cu 2 + , As 3 + H 2 S gas in presence of dil. HCl III Al 3 + , Fe 3 + NH 4 OH in presence of NH 4 Cl IV Co 2 + , Ni 2 + , Mn 2 + , Zn 2 + H 2 S in presence of NH 4 OH V Ba 2 + , Sr 2 + , Ca 2 + ( NH 4 ) 2 CO 3 in presence of NH 4 OH VI Mg 2 + None So, the correct answer is P → i , Q → iii , R → iv , S → ii

Cations	Group reaction
$P \to {Pb}^{2 +}, {Cu}^{2 +}$	$H_{2} S$ gas in presence of dilute $HCl$
$Q \to {Al}^{3 +}, {Fe}^{3 +}$	${({NH}_{4})}_{2} {CO}_{3}$ in presence of ${NH}_{4} OH$
$R \to {Co}^{2 +}, {Ni}^{2 +}$	${NH}_{4} OH$ in presence of ${NH}_{4} CI$
$S \to {Ba}^{2 +}, {Ca}^{2 +}$	$H_{2} S$ in presence of ${NH}_{4} OH$

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Group	Cations	Group reagent
Zero	${NH}_{4}^{+}$	None
I	${Pb}^{2 +}$	Dilute HCl
II	${Pb}^{2 +}, {Cu}^{2 +}, {As}^{3 +}$	$H_{2} S$ gas in presence of dil. HCl
III	${Al}^{3 +}, {Fe}^{3 +}$	${NH}_{4} OH$ in presence of ${NH}_{4} Cl$
IV	${Co}^{2 +}, {Ni}^{2 +}, {Mn}^{2 +}, {Zn}^{2 +}$	$H_{2} S$ in presence of ${NH}_{4} OH$
V	${Ba}^{2 +}, {Sr}^{2 +}, {Ca}^{2 +}$	$({NH}_{4})_{2} {CO}_{3}$ in presence of ${NH}_{4} OH$
VI	${Mg}^{2 +}$	None