Inorganic acid,also known as mineral acid, is the general term that describes a number of inorganic compounds belonging to acids. Inorganic acid is a compound consisting of hydrogen and non-metallic elements or their groups, e.g., hydrochloric acid (HCI), nitric acid (HNO3), boric acid (H3BO3), sulfuric acid (of H2SO4), carbonic acid (H2CO3), phosphoric acid (of H3PO4), etc.