1.

MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natually as the black coloured mineral pyrolusite. It is an oxidising agent, and decomposes to Mn_(3)O_(4) on heating to 530^(@)C. It is used in the preparation of potassium permanaganate and in the productioon of Cl_(2) gas. Over half million tonnes per year of MnO_(2) is used in dry batteries. Q. In which of the following species, the colour is due to charge transfer? (I)[Mn(OH)_(4)]^(2-)(II)MnO_(4)^(2-)(III)MnO_(4)(IV)KMnO_(4)

Answer»

I, II, III
II, IV
I, III
only IV

Answer :D


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