JEE Main202224 Jun 2022Morning ShiftChemistryd and f Block ElementsActual
The difference in oxidation state of chromium in chromate and dichromate salts is___
Correct answer
0
Step-by-step solution
Cr 2 O 7 2 - + OH - ⟶ 2 CrO 4 2 - Let the oxidation number of chromium be x The oxidation state of chromium in Cr 2 O 7 2 -   = 2 x + ( - 2 ) 7 = - 2 x = + 6 Oxidation state of Cr in CrO 4 2 - = x + ( - 2 ) 4 = - 2 x = + 6 . So, the oxidation number of Cr   in   CrO 4 2 -   is   also   + 6 . Hence, the difference in oxidation number between ions is 0