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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Redox Reactions

NTA Abhyas 2020 · Chemistry · Redox Reactions

Find out the compounds that will disproportionate in their aqueous...

Find out the compounds that will disproportionate in their aqueous solution.

(I)ClO4−→+0.36VClO3−→+0.33VClO2→+0.66VOCl−→+0.40V12Cl2→+1.36VCl−\left(I\right){ClO}_{4}^{-} \overset{+ 0.36V}{→}{ClO}_{3}^{-} \overset{+ 0.33V}{→}Cl{O}_{2}\overset{+ 0.66V}{→}OCl^{-}\overset{+ 0.40V}{→}\dfrac{1}{2}C{l}_{2}\overset{+ 1.36V}{→}Cl^{-}

\left(II\right){MnO}_{4}^{-} \overset{+ 0.56V}{→}{MnO}_{4}^{2 -} \overset{+ 2.22V}{→}Mn{O}_{2}\overset{+ 0.95V}{→}Mn^{3 +}\overset{+ 1.55V}{→}Mn^{2 +}\overset{- 0.19V}{→}Mn

Options

  1. A
    (I) (II)
    ClO2,Cl2{ClO}_{2}, {Cl}_{2} MnO42−,Mn3+Mn{O}_{4}^{2 -}, Mn^{3 +}
  2. B
    (I) (II)
    ClO3−,OCl−Cl{O}_{3}^{-}, OCl^{-} MnO2,Mn2+Mn{O}_{2}, Mn^{2 +}
  3. C
    (I) (II)
    OCl−OCl^{-} only MnO2,Mn2+Mn{O}_{2}, Mn^{2 +}
  4. D
    (I) (II)
    ClO3−Cl{O}_{3}^{-} only MnO2{MnO}_{2} only

Correct answer

A.

(I) (II)
ClO2,Cl2{ClO}_{2}, {Cl}_{2} MnO42−,Mn3+Mn{O}_{4}^{2 -}, Mn^{3 +}

Step-by-step solution

If the reaction sequence is written in reduction order then if right side reduction potential is higher than left side reduction potential then that compound will disproportionate.
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