NEET Chemistry Coordination Number MCQ Question
Consider a coordination compound with a central metal ion surrounded by ligands in an octahedral geometry. If the compound is represented as [Co(NH3)6]Cl3, which of the following correctly describes the coordination number of the cobalt ion?
6, because there are six ammonia molecules directly bonded to cobalt.
3, because there are three chloride ions present.
9, because the sum of chloride ions and ammonia molecules is nine.
4, because the chloride ions are outside the coordination sphere.
Correct Answer
Detailed Explanation
The coordination number of a metal ion is defined by the number of ligand donor atoms bonded directly to it. In [Co(NH3)6]Cl3, there are six ammonia molecules bonded to cobalt, giving it a coordination number of 6.
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