Which of the following substances have a pH value that is closest to 0 (zero)?

Concentrated Hydrochloric Acid [HCl]

The correct answer is option 1. Concentrated Hydrochloric Acid [HCl].

Among the options provided, the substance with a pH value that is closest to 0 (zero) is concentrated Hydrochloric Acid [HCl]

Concentrated hydrochloric acid is a strong acid and has a very low pH value, typically close to 0. It is highly acidic due to the presence of a large concentration of hydrogen ions (H+) in solution.