Question:
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 25, 2025
- 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
When manganese dioxide (MnO\(_2\)) is fused with potassium hydroxide (KOH) in the presence of oxygen, it undergoes oxidation to form potassium manganate (K\(_2\)MnO\(_4\)).
\[
2MnO_2 + 4KOH + O_2 \rightarrow 2K_2MnO_4 + 2H_2O
\]
- This reaction occurs at high temperature and is an example of oxidative fusion.
- Potassium manganate (\( K_2MnO_4 \)) is a green compound that can be further oxidized to purple potassium permanganate (KMnO\(_4\)) in an acidic medium.
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