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Question

The number of unpaired electrons in Mn4+(Z=25) is

A
Four
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B
Two
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C
Five
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D
Three
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Solution

The correct option is D Three
Mn4+ has electronic configuration [Ar]3d3
The three d electrons will be unpaired according to Hund's rule of maximum multiplicity.
Hence, number of unpaired electrons in Mn4+(Z=25) is 3

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