Question

The oxidation states of the most electronegative element in the products of the reaction, BaO₂ with dil. H₂SO₄ is(a) 0 and –1 (b) –1 and –2(c) –2 and 0 (d) –2 and –1

Answer 1

The products of the reaction are hydrogen peroxide (H2O2) and insoluble barium sulphate (BaSO4).

BaO2 + H2SO4 = BaSO4 + H2O2

The most electronegative element here is oxygen.

The oxidation state of oxygen in H2O2 is -1, and it is -2 in BaSO4.

So, the ans is ( b ) -1 and -2