Match List I with List II. List-I (Ion): A. Co^2+, B. Mg^2+, C. Pb^2+, D. Al^3+. List-II (Group Number in Cation Analysis):

Question

Match List I with List II. List-I (Ion): A. Co^2+, B. Mg^2+, C. Pb^2+, D. Al^3+. List-II (Group Number in Cation Analysis):

I. Group-I,

II. Group-III,

III. Group-IV,

IV. Group-VI.

Choose the correct answer from the options given below:

1. A. A-III, B-IV, C-II, D-I
2. B. A-III, B-IV, C-I, D-II (Correct answer)
3. C. A-III, B-II, C-IV, D-I
4. D. A-III, B-II, C-I, D-IV

Correct Answer

Option B — A-III, B-IV, C-I, D-II

Detailed Solution & Explanation

The correct answer is A-III, B-IV, C-I, D-II.

Key Points

• Co$^{2+}$ is precipitated as sulphide in Group-IV (III in the list).
• Mg$^{2+}$ is a Group-VI cation (IV in the list).
• Pb$^{2+}$ precipitates as chloride in Group-I (I in the list).
• Al$^{3+}$ is precipitated as hydroxide in Group-III (II in the list).
• Matching: A-III, B-IV, C-I, D-II.