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प्रश्न
Give reason for the following:
Aqua regia dissolves gold and platinum.
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उत्तर
\[\ce{3HCl + HNO3 -> 2H2O + NOCl + 2[Cl]}\]
Gold in Aqua regia :
\[\ce{Au + 4[Cl] -> AuCl3}\]
Platinum in Aqua regia :
\[\ce{Pt + 4[Cl] -> PtCl4 }\]
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संबंधित प्रश्न
What is the purpose of Conc. H2SO4 in the above preparation?
Why is the temperature maintained at 200°C in the above reaction?
Can we use conc. HCl in place of Conc. H2SO4 ?
Name the catalyst used in Ostwald process.
Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.
What happen when (Given balanced equation):
Limestone reacts with nitric acid?
Why does pure nitric acid take on a yellowish brown colour when exposed to light?
What happens when
NH3 solution is added to CuSO4 solution drop by drop and then in excess.
Write the equation for the reaction of dilute nitric acid with copper.
Explain why nitric acid is kept in a reagent bottle for a long time.
