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What is aqua regia? How is it prepared?...

What is aqua regia? How is it prepared?

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i.Aqua regia is a highly corrosive and fiming liquid.
ii. It is one of the few reagents that are able to dissolve gold and platinum.
iii. It is prepared by mixing concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1.
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TARGET PUBLICATION-METALLURGY-ANSWER THE FOLLOWING
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  2. Are all the metals equally reactive?

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