Aqua regia is: w) concentrated nitric acid x) a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid y) concentrated hydrochloric acid z) a mixture of sulfuric acid and hydrochloric acid
option x. Aqua regia is a call given to an answer aggregate of acids found in a precise ratio. It is a compound having nitric acid and hydrochloric acid in a set proportion. The ratio wherein each those acids are gift is 1:3 .