Question

The acid which is not a monobasic acid:
(A) Formic acid
(B) Sulphurous acid
(C) Acetic acid
(D) Nitric acid

Answer 1

Hint : In order to this question, we will first mention the correct given acid which is not a monobasic acid and then we will also discuss the reason behind the type of acid is not monobasic. And then we will discuss much more about that acid.

Complete Step By Step Answer:
Formic acid is not a monobasic acid.
In an acid-base reaction, a monobasic acid can only give one hydrogen ion to a base. As a result, a monobasic molecule only has one hydrogen atom that can be replaced. The number of hydronium ions generated by one molecule of an acid in its aq. solution is known for its basicity.
Sulphurous acid, Acetic acid and Nitric acid are the common examples of monobasic acid because they have only one hydrogen atom that can be replaced.
The simplest carboxylic acid is formic acid, often known as methanoic acid. Its chemical formula is ${H_2}C{O_2}$ . As we can see, formic acid has 2 hydrogen atoms that can be replaced. Hence, Formic acid doesn’t match the property of Monobasic acid.
It's a crucial step in chemical synthesis that can be found in nature, most notably in ants. The word "formic" derives from the Latin word for ant, formica, and refers to its early isolation via ant body distillation. Formates are esters, salts, and the anion generated from formic acid. Methanol is used to make formic acid in industry.
Hence, the correct option is (A) Formic acid.

Note :
In an acid-base reaction, a monobasic acid can only give one hydrogen ion to a base. As a result, a monobasic molecule only has one hydrogen atom that can be replaced. In water, monobasic acids ionise, yielding only one ${H^ + }$ ion per acid molecule.