JEE Main20236 Apr 2023Morning ShiftChemistryd and f Block ElementsActual
In ammonium - phosphomolybdate, the oxidation state of Mo is + _ _ _ _ _ _ _
Correct answer
6
Step-by-step solution
Phosphomolybdate is an anion containing both phosphorus and molybdenum, with the chemical formula NH 4 3 PO 4 · 12 MoO 3 . The ammonium ion has a total charge of + 3 , and the phosphate ion has a total charge of - 3 . Therefore, the 12   MoO 3 units in the compound must have a total charge of + 3   -   ( - 3 )   =   + 6 . Each MoO 3 unit contains one Mo atom and three O atoms. The total oxidation state of the three O atoms is - 6 , since each O atom has an oxidation state of - 2 . So,