Question

Which among the given acids is a monobasic acid?

• A. Sulphuric acid
• B. Hydrochloric acid
• C. Carbonic acid
• D. Phosphoric acid

Answer 1

The correct option is B

Hydrochloric acid

A monobasic acid is an acid that has only one hydrogen ion to donate to a base in an acid-base reaction or it can release only one hydrogen ion when it is mixed in an aqueous solution. Therefore, a monobasic molecule has only one replaceable hydrogen atom. Similarly, dibasic acids have two replaceable hydrogen atoms and tribasic have three replaceable hydrogen atoms.

Among the given acids

(1) Hydrochloric acid($HCl$) is a monobasic acid.

(2) Phosphoric acid($H_{3}P{O}_4$) is a tribasic acid.

(3) Sulphuric acid($H_{2}S{O}_4$) is a dibasic acid.

(4) Carbonic acid($H_{2}C{O}_3$) is a dibasic acid.