Question:medium
When MnO\(_2\) is fused with KOH in air, it gives:
When MnO\(_2\) is fused with KOH in air, it gives:
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Further oxidation of K\(_2\)MnO\(_4\) in acidic medium produces KMnO\(_4\) (potassium permanganate), which is a strong oxidizing agent.
Updated On: Feb 24, 2026
- KMnO\(_4\)
- K\(_2\)MnO\(_4\)
- Mn\(_2\)O\(_7\)
- Mn\(_2\)O\(_3\)
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The Correct Option is B
Solution and Explanation
Upon fusion of manganese dioxide (MnO\(_2\)) with potassium hydroxide (KOH) and oxygen at high temperatures, an oxidative fusion process occurs, yielding potassium manganate (K\(_2\)MnO\(_4\)). The balanced chemical equation for this reaction is:
\[
2MnO_2 + 4KOH + O_2 \rightarrow 2K_2MnO_4 + 2H_2O
\]
Potassium manganate (K\(_2\)MnO\(_4\)) is a green substance that can be subsequently oxidized to purple potassium permanganate (KMnO\(_4\)) under acidic conditions.
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