Potassium permanganate on heating at 513 K gives a product which is :

The nature of oxides V₂O₃ and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is :

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?

The spin only magnetic moments (in BM) for free Ti³⁺, V²⁺ and Sc³⁺ ions respectively are :

(At.No. Sc : 21, Ti : 22, V : 23)