Aqua regia is prepared by mixing freshly prepared concentrated HCl and concentrate `HNO_(3)` in the ratio
1:3
2:3
3:1
3:2

Pure H_(2)S is prepared by the action of concentrated HCl on

Aqua regia is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid. What is the ratio of this mixture?

Tin reacts with concentrated HNO_(3) and gives:

The mixture of concentrated HCl and HNO_(3) made in 3:1 ratio contains