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  4. An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is B.M. (Nearest integer)

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Q. An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is _________ B.M. (Nearest integer)

JEE MainJEE Main 2022The d-and f-Block Elements

Solution:

$3 MnO _{4}^{2-}+4 H ^{+} \longrightarrow 2 \overset{+}{Mn}O _{4}^{-}+ \overset{+4}{Mn}O _{2}+2 H _{2} O$
$Mn ^{+7}=$ no. of unpaired electrons is ' $0$ '
$\mu=0 \text { B.M. }$