(a) Give reasons for the following :
(i) `Mn^(3+)` is a good oxidising agent.
(ii) `E_(M2+//M)^(@)` values are not regular for first row transition metals (3d series).
(iii) Although 'F' is more electronegative then 'O', the highest Mn fluoride is `MnF_(4)` whereas the highest oxide is `Mn_(2)O_(7)`.
Complete the following equations :
(ii) `2 CrO_(4)^(2-)+2H^(+)rarr`
(ii) `KMnO_(4)overset("heat")rarr`