question_answer

How would you account for the increasing oxidizing power in the series                                [1]

Answer:

 Oxidation state of V = + 5 Group VB (5)  Oxidation state of Cr = + 6 Group VIB (6) Oxidation state of Mn = + 7 Group VIIB (7) All the above oxoanions of maximum oxidation states of their respective groups, hence, can be reduced to lowest state. Thus, they can gain electrons. Thus, oxidising power is in order Stability of lower oxidation state being in order               [1]