Match the complexes in Column I with their properties listed in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.
| Column I | Column II |
|---|---|
| (A) | (p) geometrical isomers |
| (B) | (q) paramagnetic |
| (C) | (r) diamagnetic |
| (D) | (s) metal ion with +2 oxidation state |
Answer: A → I, A → II, A → IV, B → I, B → III, B → IV, C → II, C → IV, D → II, D → IV
Solution
(A) : Co is in +2 oxidation state (, paramagnetic). The complex is octahedral and can exist as cis and trans isomers (geometrical isomers). Matches: p, q, s.
(B) : Pt is in +2 oxidation state (, diamagnetic in square planar geometry). Can exist as cis and trans isomers. Matches: p, r, s.
(C) : Co is in +2 oxidation state (, paramagnetic). No geometrical isomers. Matches: q, s.
(D) : Ni is in +2 oxidation state (, paramagnetic with weak field ligand water). No geometrical isomers. Matches: q, s.
(B) : Pt is in +2 oxidation state (, diamagnetic in square planar geometry). Can exist as cis and trans isomers. Matches: p, r, s.
(C) : Co is in +2 oxidation state (, paramagnetic). No geometrical isomers. Matches: q, s.
(D) : Ni is in +2 oxidation state (, paramagnetic with weak field ligand water). No geometrical isomers. Matches: q, s.
JEE Advanced · 2007 · 08 Apr 2007 · Paper 1 · Match the columns