The order of stability of complexes of ion Cu+2, Ni+2, Mn+2 and Fe+2 decreases in the order -

The correct order of basicity of oxides of vanadium is

Which of the following statement is correct :

Given below are two statements Statement I: Sc exhibits only +3 oxidation state Statement II: Mn exh

Which of the following compounds is not coloured:

Which one of the following transition elements does not exhibit variable oxidation state ?