Fusion of $\mathrm{MnO}_2$ with KOH in presence of $\mathrm{O}_2$ produces a salt $\mathbf{W}$. Alkaline solution of $\mathbf{W}$ upon eletrolytic oxidation yields another salt $\mathbf{X}$. The manganese containing ions present in $\mathbf{W}$ and $\mathbf{X}$, respectively, are $\mathbf{Y}$ and $\mathbf{Z}$. Correct statement(s) is (are)
Select ALL correct options:
A
$\mathbf{Y}$ is diamagnetic in nature while $\mathbf{Z}$ is paramagnetic
B
Both $\mathbf{Y}$ and $\mathbf{Z}$ are coloured and have tetrahedral shape
C
In both $\mathbf{Y}$ and $\mathbf{Z}$, $\pi$-bonding occurs between p-orbitals of oxygen and d-orbitals of manganese.
D
In aqueous acidic solution, $\mathbf{Y}$ undergoes disproportionation reaction to give $\mathbf{Z}$ and $\mathrm{MnO}_2$.
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