`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)`

Options

A. I, II, III
B. II, IV
C. I, III
D. only IV

Answer

D