MHT CET20192 May 2019Morning ShiftChemistryRedox ReactionsActual
In the reaction, M n O 4 a q . - 1 + B r a q . - 1 → M n O 2 s + B r O 3 a q - 1 , the correct change in oxidation number of the species involved is
Options
- AB r + 5 to B r - 1
- BM n + 7 to M n + 2
- CM n + 7 to M n + 3
- DB r - 1 to B r + 5
Correct answer
D. B r - 1 to B r + 5
Step-by-step solution
M n O 4 2 - a q . + B r - 1 a q . → M n O 2 s + B r O 3 - a q . B r O 3 - a q . ⇒ x + 3 - 2 = - 1 ⇒ x = - 1 + 6 = + 5 Hence, bromine changes from B r - 1 to B r + 5 .