Question

Aqua Regia or Royal liquid is a mixture of

• A. 1 part of Conc.$HN{O}_3$ and 3 part of Conc. $HCl$
• B. 1 part of Dil.$HN{O}_3$ and 3 part of Dil. $HCl$
• C. 3 part of Conc.$HN{O}_3$ and 1 part of Conc.$HCl$
• D. 3 part of Dil.$HN{O}_3$ and 1 part of Dil. $HCl$

Answer 1

The correct option is A

1 part of Conc.$HN{O}_3$ and 3 part of Conc. $HCl$

Aqua regia is also known as 'Royal liquid' is a mixture of concentrated nitric acid($HN{O}_3$) and concentrated hydrochloric acid ($HCl$) taken in the ratio 1:3. It is a corrosive, fuming yellow or red liquid, used by jewellers to dissolves noble metals such as gold, platinum, etc.

So the composition of aqua regia or royal liquid is 1 part of Conc.$HN{O}_3$ and 3 part of Conc. $HCl$.