(i) Write the electronic configuration of `Cu^(+)` and `Cu^(2+)` ions (Z=29). State which one is more paramagnetic.
(ii) What happens when ( give equations only ).
(a) In acidic medium , `KMnO_(4)` reacts with `FeSO_(4)`.
(b) In basic medium, `KMnO_(4)` reacts with enthylene.

Explanation

(i) Electronic configuration of `Cu^(+)` ion , `[Ar]^3d^(10)`.
Electronic configuration of `Cu^(2+)` ion , `[Ar]3d^(9),Cu^(+)` ion is diamagnetic whereas `Cu^(2+)` ion is paramagnetic in nature .
(ii) N/A