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Question

Noble metals get dissolved in aquaregia the composition of aqua regia is:

A
3HCl+HNO3
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B
3HNO3+H2SO4
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C
HCl+3HNO3
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D
HNO3+3h2SO4
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Solution

The correct option is A 3HCl+HNO3
Aqua regia is a mixture of Hydrochloric acid (HCl) and Nitric acid HNO3 at a ratio of 3:1 or 4:1 respectively.
It is used to dissolve gold and platinum and hence used in extraction of these noble metals.

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