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  4. Identify the product and its colour when MnO2 is fused with solid KOH in the presence of O2.

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Q. Identify the product and its colour when $MnO_2$ is fused with solid $KOH$ in the presence of $O_2$.

The d-and f-Block Elements

Solution:

$2 MnO _2+4 KOH + O _2 \longrightarrow \underset{\text { dark green }}{2 K _2 MnO _4} +2 H _2 O $