Q. Which of the following statements is/are correct for aqua regia?

1. It is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid.
2. Hydrochloric acid and nitric acid are in ratio 2:1
3. It can dissolve gold.

Select the correct answer from the codes given below:
Answer: Only 1 and 3
Notes: Aqua regia, (Latin for 'royal water') is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1. It can dissolve gold, even though neither of these acids can do so alone. Aqua regia is a highly corrosive, fuming liquid. It is one of the few reagents that is able to dissolve gold and platinum.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.