This video lecture from Group VA and Group VIA Elements (F.Sc. second year Chemistry) covers Aqua Regia or royal water. Aqua regia is a mixture of 3 volumes of concentrated hydrochloric acid and one volume of nitric acid. It has exceptional oxidizing nature and is employed to dissolve gold and platinum. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.