NEET Chemistry Coordination Number MCQ Question with Solution

In the diagram shown above, which complex ion has a coordination number of 4?

A

[Ni(NH₃)₄]²⁺

B

[Fe(C₂O₄)₃]³⁻

C

[Co(en)₃]³⁺

D

[Pt(NH₃)₆]²⁺

Correct Answer

Option A

Detailed Explanation

The coordination number is determined by the number of ligand donor atoms bonded to the central metal ion. [Ni(NH₃)₄]²⁺ has a coordination number of 4, as it is bonded to four NH₃ ligands.

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