`Mn^(2+), Mn^(+3), Mn^(+6)` have the colours

Assertion : Cr^(2+) is reducing and Mn^(3+) is oxidising. Reason : Cr^(2+) and Mn^(3+) have d^4 configuration.

Assertion : Cr^(2+) is reducing and Mn^(3+) is oxidising. Reason : Cr^(2+) and Mn^(3+) have d^4 configuration.

Which of the Zn^(2+) , Fe^(3+) and Mn^(2+) are expected to be coloured and why ?

transition elements are 'd' block elements. Cr^(2+) and Mn^(3+) have d^4 configuration. But Cr^(2+) is reducing and Mn^(3+) is oxidizing. Why?

Four statement of Cr and Mn are given below. (P). Cr^(2+) and Mn^(3+) have the same electronic configuration. (Q). Cr^(2+) is a reducing agent while Mn^(3+) in an oxidizing agent. (S). Both Cr and Mn are oxidizing agent. The correct statement are:

E^(@) for Mn^(3+), Mn^(2+) is more positive than that for Fe^(3+), Fe^(2+) , Why?