Question

The correct order of increasing oxidising power in the series is

• A. $VO^{+}_{2}<\, Cr_{2}O^{2-}_{7}<\,MnO^{-}_{4}$
• B. $Cr_{2}O^{2-}_{7}<\, VO^{+}_{2}<\,MnO^{-}_{4}$
• C. $Cr_{2}O^{2-}_{7}<\,MnO^{-}_{4}<\, VO^{+}_{2}$
• D. $MnO^{-}_{4} <\, Cr_{2}O^{2-}_{7}<\,VO^{+}_{2}$

Answer 1

Answer: (A)

Greater the oxidation state, stronger the oxidising power $\underset{(V^{+5})}{VO^{+}_{2}}<\, \underset{(Cr^{6+})}{Cr_{2}O^{2-}_{7}}<\, \underset{(Mn^{7+})}{MnO^{-}_{4}}$