Multiple choice general knowledge science & technology "aqua regia" composition ? nitric acid (3)+hydrochloric acid(1) nitric acid (1)+hydrochloric acid(3) nitric acid (3)+sulphuric acid(1) hydrochloric acid (3)+sulphuric acid(1) Reveal answer Fill a bubble to check yourself B Correct answer Explanation Aqua regia is a highly corrosive, fuming yellow or red liquid mixture formed by freshly mixing concentrated nitric acid and concentrated hydrochloric acid, normally in a volumetric ratio of 1 part nitric acid to 3 parts hydrochloric acid.