Why Mn+2 oxidising in nature

Dear Student,

There seems to be some problem in your question as Mn²⁺ is not oxidising.Instead Mn^​3+ is oxidising.
Valence shell Electronic configuration of Mn³⁺= 3d^​5 4s¹
Mn³⁺ can easily lose its one electron present in 4s orbital to attain half filled stability. Therefore, Mn³⁺ is oxidising in nature.