Question

Aqua regia is a mixture of $conc.HN{O}_3$ and $conc.HCl$ in the ratio of .

(A) 1:3
(B) 2:3
(C) 3:1
(D) 3:2 [1 mark]

Answer 1

The correct answer is option A: 1:3.

Aqua regia is a mixture of $conc.HN{O}_3$ and $conc.HCl$ in the ratio of 1:3. Aqua regia dissolves noble metals like gold, platinum, etc. and is hence used in the purification process of those metals.