In which reaction does the oxidation number of oxygen increase?

Answer 1

Out of these possible answers A) Ba(NO3)2(aq) + K2SO4(aq) -> BaSO4(s) + 2KNO3(aq)

B) HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l)

C) MgO(s) + H2)(l) -> Mg(OH)2(s) D) 2SO2(g) + O2(g) -> 2 SO3(g) E) 2H2O(l) -> 2H2(g) + O2(g)

Answer 2

It is called the oxidation process. Under this the element looses the electron so it's oxidation state increases.

Answer 3

In the reaction where hydrogen peroxide decomposes into water and oxygen gas, the oxidation number of oxygen increases from -1 to 0.