When the first element of the periodic table is treated with dioxygen, it gives a compound whose solid state floats on its liquid state. This compound has an ability to act as an acid as well as a base. What products will be formed when this compound undergoes auto ionization?

This is a short answer type question as classified in NCERT Exemplar

The compound is water which undergoes self ionization.

The autoprotolysis (self-ionization) of water takes place as follows:

H₂O (l)     +      H₂O (l)             →        H₃O⁺ (aq)         +          OH^- (aq)

Acid                Base