Calculate magnetic moment of $M n$ in $M n O_{4}^{-}$ $x$ unpaired electrons on $M n$ in $M n O_{4}^{-} y$ BM.
$x, y$ are respectively:

1, \sqrt{3}

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2, 2 \sqrt{2}

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3, \sqrt{15}

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none of these

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Solution

The correct option is A $1, \sqrt{3}$
Oxidation number of Mn in $M n O_{4}^{-} = + 7$ it is expected that ( $M n$ in) $M n O_{4}^{-}$ sholud have [Ar] configuration and should be colourless. But one electron is transfered to Mn from oxygen and thus $M n$ in $M n O_{4}^{-}$ has one unpaired electron making it paramagnetic.Magnetic moment $= \sqrt{N (N + 2)} = \sqrt{3} B M$

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Calculate magnetic moment of Mn in MnO−4 x unpaired electrons on Mn in MnO−4y BM. x,y are respectively:

Calculate magnetic moment of $M n$ in $M n O_{4}^{-}$ $x$ unpaired electrons on $M n$ in $M n O_{4}^{-} y$ BM.
$x, y$ are respectively: