A) \[KMn{{O}_{4}}\]
B) \[{{K}_{2}}Mn{{O}_{4}}\]
C) \[Mn{{(OH)}_{2}}\]
D) \[M{{n}_{3}}{{O}_{4}}\]
Correct Answer: B
Solution :
\[\underset{\text{pyrollusite}}{\mathop{Mn{{O}_{2}}}}\,+KOH\,\to \,{{K}_{2}}Mn{{O}_{4}}\]
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