Chemistry - Redox Reactions Question with Solution | TestHub

ChemistryRedox ReactionsDetermination of Oxidation StateHard2 minPYQ_2014

ChemistryHardsingle choice

Assertion: The correct order of oxidising power is : $VO_{2}^{+} < Cr_{2} O_{7}^{2 -} < MnO_{4}^{-}$ Reason: The oxidation state of $Mn$ is +7 .

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Solution:

The oxidation states of the given compounds are $VO_{2}^{+} : x + 2 (- 2) = + 1 \Rightarrow x = + 5 Cr_{2} O_{7}^{2 -} : 2 x + 7 (- 2) = - 2 \Rightarrow 2 x = + 12 \Rightarrow x = + 6 MnO_{4}^{-} : x + 4 (- 2) = - 1 x = - 1 + 8 = + 7$ The correct order of oxidising power is $VO_{2}^{+} < Cr_{2} O_{7}^{2 -} < MnO_{4}^{-}$ due to the increasing stability of the lower species to which they are reduced.

Stream:AIIMSSubject:ChemistryTopic:Redox ReactionsSubtopic:Determination of Oxidation State

⏱ 2mℹ️ Source: PYQ_2014

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