Classification of Acids Depending upon the elements present, acids may be classified as follows.(i) Oxyacid : Acids that contain both hydrogen and oxygen are called oxyacids. For example, nitric acid (HNO3), sulphuric acid (H2SO4) and phosphoric acid (H3PO4) are oxyacids. (ii) Hydracid : Acids that contain hydrogen and other nonmetallic element(s), except oxygen, … [Read more...] about Classification of Acids