49. Aquaregia is a mixture of the following in the ratio 1 : 3 by volume A.Conc. HNO3 and conc. HCl B.Conc. HNO3 and conc. H2SO4 C.Dil. HCl and dil. HNO3 D.Conc. HCl and conc. HNO3
Answer: Option A Solution: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids which is formed by freshly mixing concentrated Nitric acid (HNO3) and Hydrochloric acid (HCl), optimally in a volume ratio of 1 : 3. It is used in dissolving gold.
