Question

1. calculate the oxidation number of oxygen in H2O2 and O2F2.
2.calculate the ph of 0.05M H2SO4 solution

Answer 1

Ans.1=> Oxidation number in oxygen in H₂O₂ is -1.
             Oxidation number in oxygen in O₂F₂ is +1.
Ans. 2=> Since H₂SO₄ ionizes almost completely in water, hence no of H⁺ ions                    will be (2×0.5) mole = 1 mole.
               (H⁺) = 1
               pH = -log (H⁺)
                    = -log 1
                    =  0.