SSC MTS EXAM

Detailed explanation-1: -hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.

Detailed explanation-2: -When HCl molecules dissolve they dissociate into H+ ions and Cl-ions. HCl is a strong acid because it dissociates almost completely. By contrast, a weak acid like acetic acid (CH3COOH) does not dissociate well in water – many H+ ions remain bound-up within the molecule.