of an acid. : having only one replaceable hydrogen atom.

Why is it called monobasic?

Basicity of an acid is the number of hydronium ions formed by one molecule of the acid in its aq. ... Hence, a monobasic molecule has solely one replaceable hydrogen atom. Monobasic acids ionize in water to give only one H+ ion per acid molecule.

Is H3PO3 monobasic?

Here, H3PO3 is not tribasic as the –H atom present is the acidic hydrogen, it can readily ionize 2 protons (two –OH bonds present here) therefore it is a dibasic acid. ... Since H3PO2has only one proton available to ionize i.e. only one H+can be donated, therefore it is monobasic. Therefore, option C is the correct answer.