Question

Among the following, which is known as "SPIRIT OF SALT"?

• A. Nitric acid
• B. Boric acid
• C. Hydrochloric acid
• D. Thioglycolic acid

Hint:

- Hydrochloric acid is often called "Spirit of Salt" due to its historical preparation process.
 - It is widely used in industrial applications, cleaning, and chemical synthesis.

Answer 1

The Correct Option is C

"Spirit of Salt" is a common name for Hydrochloric acid (HCl). It is a strong acid commonly used in laboratories and industries. The term "Spirit of Salt" likely originates from the historical association with the preparation of the acid, which involved the use of salt (sodium chloride) and sulfuric acid. 

Why Other Options Are Incorrect: 

- (A) Nitric acid: Nitric acid (HNO\(_3\)) is a strong acid but is not known as "Spirit of Salt". 

- (B) Boric acid: Boric acid (H\(_3\)BO\(_3\)) is a weak acid and is not referred to as "Spirit of Salt". 

- (D) Thioglycolic acid: Thioglycolic acid (HSCH\(_2\)COOH) is a different organic acid used in cosmetics and hair treatment, not known as "Spirit of Salt". Thus, Hydrochloric acid is the correct answer as it is commonly referred to as "Spirit of Salt".