Question

Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.

1. Al³⁺
2. Cu²⁺
3. Ba²⁺
4. Co²⁺
5. Mg²⁺

Choose the correct answer from the options given below:

Options

• E, C, D, B, A

• E, A, B, C, D

• B, A, D, C, E

• B, C, A, D, E

Answer 1

B, A, D, C, E

Explanation:

Group	Cations	Group Reagent
Group zero	\[\ce{NH+_4}\]	None
Group-I	Pb2+	Dil. HCl
Group-II	Pb2+, Cu2+, As3+	H2S gas in the presence of dil. HCl.
Group-III	Al3+, Fe3+	NH4OH in the presence of NH4Cl.
Group-IV	Co2+, Ni2+, Mn2+, Zn2+	H2S in the presence of NH4OH.
Group-V	Ba2+, Sr2+, Ca2+	(NH4)2CO3 in the presence of NH4OH.
Group-VI	Mg2+	None