Give an example of dibasic acid. How is it obtained from the corresponding nonmetal? Give balanced equations.

Explanation

Sulphuric acid si a dibasic acid. Sulphur on heating with oxygen gives sulphur dioxide which on further reaction with oxygen gives sulphur trioxide. `SO_(2)` on dissolution in water forms sulphuric acid.
`s + O_(2) to SO_(2)`
`2SO_(2) + O_(2) to 2SO_(3)`
`SO_(3) + H_(2)O to H_(2)SO_(4)`