Which of the following acids is used in the purification of gold and silver?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Nitric acid.
Nitric acid is used in the purification of gold and silver.
- The purifying of gold involves the use of nitric acid.
- Aqua regia, often known as royal water, is an acidic liquid that dissolves gold and is used to purify scrap alloy that contains gold.
- Nitric acid and hydrochloric acid are combined in a 3:1 ratio to create aqua regia.