Question

18. The solution used by goldsmith to
bring back the glitter off old and dull
gold ornaments was *
O Cone HCI
O Cone. HNOS
O
Aqua regia
O Nao​

Answer 1

ANSWER:

The solution he had used was Aqua regia. Aqua regia is Latin word which means 'Royal Water'. It is the mixture of concentrated Hydrochloric acid and concentrated nitric acid in the ratio of 3:1. It is capable of dissolving metals like Gold and Platinum.

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Answer 2

Correct answer is Aqua regia