Question

Which of the following is used to dissolve gold?

• A. Hydrochloric acid
• B. Sulphuric acid
• C. Nitric acid
• D. Aqua Regia

Answer 1

The correct option is D

Aqua Regia

The correct option is D.

Explanation for correct option:

1. Noble metals that are dissolved in aqua Regia include gold, palladium, and gallium.
2. It is also referred to as "royal water," and it is a 3:1 blend of nitric acid and hydrochloric acid.

Explanation for incorrect options:

Option A:

Hydrochloric acid only dissolves gold in the combination with nitric acid but not alone.

Option B:

Sulphuric acid cannot be able to dissolve gold as gold is more inert in nature.

Option C:

Nitric acid only dissolves in the combination with hydrochloric acid but not alone.

Final answer: Aqua Regia is used to dissolve gold.