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प्रश्न
How will you prepare Aqua regia from nitric acid?
उत्तर
Aqua-regia is a mixture of Conc. Nitric acid and conc. Hydrochloric acid in 1:3.
\[\ce{3HCl + HNO3 -> 2H2O + NOCl + 2[Cl]}\]
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