NEET Chemistry Coordination Number MCQ Question
Consider a coordination compound diagram where a central metal ion is surrounded by six ligands. The coordination sphere is shown in square brackets as [Co(NH3)6]3+. Which of the following statements correctly identifies the coordination number of the central metal ion?
The coordination number is 6, determined by the six sigma bonds formed by NH3.
The coordination number is 12, considering both sigma and potential pi bonds.
The coordination number is 3, as there are three NH3 pairs.
The coordination number is 0, because NH3 does not form coordinate bonds.
Correct Answer
Detailed Explanation
The coordination number is the number of sigma bonds formed by ligands with the central metal ion. In [Co(NH3)6]3+, six NH3 ligands form six sigma bonds, giving a coordination number of 6.
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