A) \[KMn{{O}_{4}}\]
B) \[{{K}_{2}}Mn{{O}_{4}}\]
C) \[MnS{{O}_{4}}\]
D) \[MnC{{l}_{2}}\]
Correct Answer: A
Solution :
[a] Electronic configuration of Mn is \[[Ar]3{{d}^{5}}4{{s}^{2}}\] .Being transition metal it has 7 valence electrons and all are involved in bond formation in\[MnO_{4}^{-}\]. Hence it has no unpaired electron.
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