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Question

Which of the following ion has the maximum theoretical magnetic moment?

A
V3+
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B
Cr3+
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C
Ti3+
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D
Co3+
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Solution

The correct option is B Co3+
Metal ion with maximum number of unpaired electrons will have highest magnetic momemt.
V3+: 3d2: 2 unpaired electrons
Cr3+: 3d3: 3 unpaired electrons
Ti3+: 3d1: 1 unpaired electrons
Co3+: 3d6: 4 unpaired electrons
Thus Co3+ will have maximum magnetic moment.
option D is correct

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