question_answer

\[MnO_{4}^{-}\]is of intense pink colour, though Mn is in (+7) oxidation state. It is due to

A) oxygen gives colour to it.

B) charge transfer when oxygen gives its electron to Mn making it Mn (+VI) hence, coloured.

C) charge transfer when Mn gives its electron to oxygen.

D) none of the above is correct.

Correct Answer: B

Solution :

[b]: The colour arise by charge transfer. In \[MnO_{4}^{-}\], an electron is momentarily transferred from oxygen to the metal and thus oxygen changes from \[{{O}^{2-}}\] to \[{{O}^{-}}\] and Mn from (+7) to (+6).