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Question

What is the volume ratio of nitric acid to hydrochloric acid in Aqua-regia?

A
1HNO3+3HCl
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B
1HCl+3HNO3
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C
1HCl+1HNO3
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D
1HNO3+2HCl
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Solution

The correct option is A 1HNO3+3HCl
Aqua regia is a mixture of hydrochloric acid (HCl) and nitric acid (HNO3) at a ratio of 3:1, i.e. the volume of a solution with 3 parts hydrochloric acid (HCl) added to 1 part of Nitric acid (HNO3).

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