Question
Identify the total number of complexes from following list having monodentate ligands in them (a) Tetracyanonickelate (II) ion (b) Potassium hexafluoroaluminate (III) (c) Tetraamminecopper(II) ion (d) Potassium trioxalatoaluminate (III)
MHT CET
Chemistry
Coordination Compounds
2026
MHT CET 2026 (17 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 4
- B. 3
- C. 2
- D. 1
Answer
B. 3
Step-by-step solution
(a) Tetracyanonickelate (II) ion: [Ni(CN)_4]^ 2- . The ligand is CN^-, which is a monodentate ligand. (b) Potassium hexafluoroaluminate (III): K_3[AlF_6]. The ligand is F^-, which is a monodentate ligand. (c) Tetraamminecopper(II) ion: [Cu(NH_3)_4]^ 2+ . The ligand is NH_3, which is a monodentate ligand. (d) Potassium trioxalatoaluminate (III): K_3[Al(C_2O_4)_3]. The ligand is C_2O_4^ 2- (oxalate), which is a bidentate ligand. Therefore, there are 3 complexes having monodentate ligands. Answer: 3
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