NEET Chemistry Coordination Number MCQ Question
Which of the following statements about coordination numbers is correct?
The coordination number of [Fe(C2O4)3]3– and [Co(en)3]3+ is 6 due to the presence of bidentate ligands.
The coordination number of [Ni(NH3)4]2+ is 6 because it has six ammonia ligands.
Coordination numbers can only be determined for octahedral complexes.
The coordination number of a complex is always equal to the number of ligands surrounding the central atom or ion.
Correct Answer
Detailed Explanation
Statement A is correct as both C2O4 2– and en are bidentate ligands that contribute to a coordination number of 6. Statement B is incorrect; the coordination number of [Ni(NH3)4]2+ is 4. Statement C is false because coordination numbers can apply to non-octahedral complexes as well. Statement D is misleading as the coordination number can exceed the number of ligands in certain cases involving bridging ligands.
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