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Reaction of Metals with Acid

Which among t...

Question

Which among the following is used to purify gold?

A

Aqua regia

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B

Calcium oxide

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C

Potassium hydroxide

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D

Aqua fortis

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Solution

The correct option is A
Aqua regia

Aqua regia is used to purify gold. Aqua regia is a mix of three parts hydrochloric acid to one part nitric acid.

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