Science, asked by animeshchettri2585, 9 months ago

Which of the following is used for dissolution of gold ? [NCERT Exemplar Problems]
(a) Hydrochloric acid
(b) Sulphuric acid
(c) Nitric acid
(d) Aqua regia

Answers

Answered by sanapsamrudhi9

Answer:

(D) Aqua regina

Explanation:

Aqua regina is used for dissolution of Nobel elements like gold.

Answered by aaryankiri

Answer:

d) AQUA REGIA

Explanation:

Aqua Regia is a mixture of nitric acid and hydrochloric acid in the ratio 1:3. It is such a powerful solution that, it can dissolve any substance even gold and platinum.

This is because the nitric acid part of it is an excellent oxidising agent whereas HCl gives Cl- ions which can form a coordination complex with gold or silver ions.

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