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JEE Main202325 Jan 2023Evening ShiftChemistryd and f Block ElementsActual

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from

Options

  1. A+ 3 to + 1
  2. B+ 6 to + 3
  3. C+ 2 to + 1
  4. D+ 6 to + 2

Correct answer

B. + 6 to + 3

Step-by-step solution

Dichromate oxidises to Cr 3 + from Cr 2 O 7 2 - in acidic medium according to the reaction. In dichromate, chromium is in +6 oxidation state and on the right hand side we have Cr in +3 state. So, the change is from +6 to +3 in acidic medium.

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