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Q.

Which of the following methods is used to dissolve gold?

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a

Aqua regia

b

Nitric acid

c

Sulphuric acid

d

Hydrochloric acid

answer is D.

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Detailed Solution

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Gold is an inert metal and does not react with any acid. Aqua regia is a mixture of nitric acid and hydrochloric acid in 1 : 3 ratio. It is used by goldsmiths to clean ornaments.

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