A) \[{{K}_{2}}Mn{{O}_{4}}\],purple green
B) \[KMn{{O}_{4}}\], purple
C) \[Mn2O3\], brown
D) \[M{{n}_{2}}{{O}_{4}}\], black
Correct Answer: A
Solution :
[a] \[{{K}_{2}}Mn{{O}_{4}}\], Purple green \[2Mn{{O}_{2}}+4KOH+{{O}_{2}}\to \underset{purple\,green}{\mathop{2{{K}_{2}}Mn{{O}_{4}}}}\,+2{{H}_{2}}O\]
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