MnO_2 when fused with KOH and oxidised in air | vedclass

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(A) $MnO_2$,when fused with $KOH$ and oxidised in air,gives a dark green compound $X$,which is potassium manganate $(K_2MnO_4)$.In acidic solution,$K_

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$K_2MnO_4$ and $KMnO_4$

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(A) $MnO_2$,when fused with $KOH$ and oxidised in air,gives a dark green compound $X$,which is potassium manganate $(K_2MnO_4)$.In acidic solution,$K_2MnO_4$ undergoes disproportionation to give an intense purple solution of potassium permanganate $Y$ $(KMnO_4)$ and $MnO_2$.The chemical reactions are:$2MnO_2 + 4KOH + O_2 \longrightarrow 2K_2MnO_4 + 2H_2O$$3K_2MnO_4 + 4H^{+} \longrightarrow 2KMnO_4 + MnO_2 + 2H_2O + 4K^{+}$Thus,$X$ is $K_2MnO_4$ and $Y$ is $KMnO_4$.

$MnO_2$ when fused with $KOH$ and oxidised in air gives a dark green compound $X$. In acidic solution,$X$ undergoes disproportionation to give an intense purple compound $Y$ and $MnO_2$. The compounds $X$ and $Y$,respectively,are

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