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JEE Main Chemistry question

ChemistryCoordination CompoundsJEE Main

The -electronic configurations of Cr^{2+}, Mn^{2+}, Fe^{2+}, Ni^{2+} are and respectively. Which of the following complexes will show the minimum paramagnetic behaviour?

Answer: (B)

Solution

With weak-field (high spin): has 4 unpaired, has 5, has 4, and

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Question ID VK-155565