Practice question

MCQ

Question

Which complex is diamagnetic?

Options

Choose one · Correct answer highlighted

[Fe(H₂O)6]2+ [CoF₆]3− [NiCl₄]2− [Ni(CN)4]2− Correct

Explanation

[Ni(CN)4]2− (Ni₂+, d8) is square planar (dsp2), with strong field CN− ligands pairing all electrons, making it diamagnetic. [NiCl₄]2− is tetrahedral and paramagnetic.

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