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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
Name the gas evolved when the following mixtures are heated.
Sodium Nitrite and Ammonium Chloride
How will you prepare the following from nitric acid?
copper nitrate
Name the Following:
Two coloured nitrates.
What do you observe when?
Concentrated nitric acid is dropped on a hot surface?
What happens when (Given balanced equation):
Nitric acid is added to Kl (aq)?
Write the equation to show the reaction between the following:
Dilute nitric acid to produce carbon dioxide.
Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
What happens when
Common salt solution is added to silver nitrate solution and NH3 solution add to it.
Give one test to distinguish between the following pair of chemicals.
Zinc nitrate solution and calcium nitrate solution
From the following list of substances, choose one substance in the case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate.
A Substance that gives off only oxygen when heated.
