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JEE Main2017ChemistryRedox ReactionsActual

The pair of compounds having metals in their highest oxidation state is

Options

  1. AMn 2 O 7   and   CrO 2 Cl 2 .
  2. BFe CN 6 3 -   and   Cu CN 4 2 - .
  3. CNiCl 4 2 -   and   CoCl 4 2 - .
  4. DFeCl 4 -   and   Co 2 O 3 .

Correct answer

A. Mn 2 O 7   and   CrO 2 Cl 2 .

Step-by-step solution

Mn 2 O 7 2 x + 7 ( − 2 ) = 0     x = 7 CrO 2 Cl 2 x + 2 ( − 2 ) + 2 ( − 1 )      x = 6

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