Which of the following oxides of manganese is stable as well as strongly acidic ?

Due to higher oxidations state, Mn2O7is stable as well as strongly acidic. The oxidation state of Mn in Mn2O7 is +7 which is the highest oxidation state of Mn. Thus it behaves as a strong acid and it is most stable. 100. The colourless species is (a) VCl3 (b) VOSO4 (c) Na3VO4 (d) [V(H2O)6]SO4 . H2O A compound shows colour due to the presence of unpaired electron in its orbital. So, according to the question +3 0 2 3 +4 0 1 4 +3 +5 0 0 4 +2 0 3 2 6 (a)VCl V Ar 4s 3d (n=2) (b)VOSO V Ar 4s 3d (n=1) (c) VO V Ar 4s 3d (n=0) (d) V(H O) Ar 4s 3d (n=3) -> -> -> -> -> -> -> So, 3 4 N