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State the conditions under which the fol...

State the conditions under which the following preparations are carried out. Give the necessary equations which need not be balanced. Potassium permanganate from manganese dioxide.

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Potassium permanganate can be prepared from manganese dioxide as follows.
(i). `MnO_2+4KOH+O_2to2K_2MnO_4+2H_2O`
(ii). `2K_2MnO_4+Cl_2to2KMnO_4+2KCl`
The above reactionn can also be carried out with ozone or carbon dioxide, or electrolytically.
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