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JEE Main 202325 JanuaryEvening Shift
Exam
JEE Main
Year
2023
Date
25 January
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2023 · 25 January · Evening Shift · Chemistry · d and f Block Elements

Potassium dichromate acts as a strong oxidizing agent in acidic...

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

Options

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

Correct answer

B. +6+ 6 to +3+ 3

Step-by-step solution

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

Dichromate oxidises to Cr3+{Cr}^{3 +} from Cr2O72−{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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