Identify the correct order of oxidizing power.

  • A
    $VO_2^+ < Cr_2O_7^{2-} < MnO_4^-$
  • B
    $Cr_2O_7^{2-} < VO_2^+ < MnO_4^-$
  • C
    $Cr_2O_7^{2-} < MnO_4^- < VO_2^+$
  • D
    $MnO_4^- < Cr_2O_7^{2-} < VO_2^+$

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The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is. . . . . . . .$Ti^{2+}, Cr^{2+}, V^{2+}$

Identify the incorrect statement.

For the four successive transition elements $(Cr, Mn, Fe, \text{ and } Co)$,the stability of $+2$ oxidation state will be in which of the following order?
(Atomic numbers: $Cr = 24, Mn = 25, Fe = 26, Co = 27$)

How would you account for the increasing oxidising power in the series $VO_2^+ < Cr_2O_7^{2-} < MnO_4^-$?

Iron exhibits $+2$ and $+3$ oxidation states. Which of the following statements is incorrect for iron?

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