NEET Chemistry Coordination Number MCQ Question
Which of the following statements about coordination numbers and ligands in coordination compounds is correct?
The coordination number of [Fe(C2O4)3]3– is 6 because oxalate acts as a bidentate ligand.
The coordination number of [Ni(NH3)4]2+ is 6 due to the presence of six ammonia ligands.
In [CoCl3(NH3)3], the coordination number of Co is 3 because it is surrounded by three chloride ions.
The coordination number of [PtCl2(NH3)2] is 4 as it contains two bidentate ligands.
Correct Answer
Detailed Explanation
Statement A is correct as the coordination number of Fe in [Fe(C2O4)3]3– is indeed 6, arising from the bidentate nature of the oxalate ligand. Statement B is incorrect because the coordination number of Ni in [Ni(NH3)4]2+ is 4, not 6. Statement C is incorrect as Co has a coordination number of 6 in that complex. Statement D is incorrect because the coordination number of Pt in [PtCl2(NH3)2] is 4, but it does not contain bidentate ligands.
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