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JEE Main202131 Aug 2021Evening ShiftChemistryRedox ReactionsActual

In which one of the following sets all species show disproportionation reaction?

Options

  1. AClO 4 - , MnO 4 - , ClO 2 - and F 2
  2. BMnO 4 2 - , ClO 2 - , Cl 2 and Mn 3 +
  3. CCr 2 O 7 2 - , MnO 4 - , ClO 2 - and Cl 2
  4. DClO 2 - , F 2 , MnO 4 - and Cr 2 O 7 2 -

Correct answer

B. MnO 4 2 - , ClO 2 - , Cl 2 and Mn 3 +

Step-by-step solution

Disproportionation reactions are a special type of redox reactions. One of the reactants in a disproportionation reaction always contains an element that can exist in at least three oxidation states. The element of reacting species is in intermediate oxidation state and simultaneously gets oxidised and reduced. MnO 4 2 - , ClO 2 - , Cl 2 and Mn 3 + are having intermediate oxidation states. Note: No option is correct in the actual question. One option is modified for its correctness.

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