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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 products formed when dilute HNO3 is added to copper.
How will you prepare the following from nitric acid?
Sodium nitrate
Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical.
What is the purpose of Conc. H2SO4 in the above preparation?
What are the reactants required for Ostwald process and what are their sources?
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
Name (formula is not acceptable) the gas produced in the following reaction:
By the action of concentrated nitric acid on copper.
Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
Identify the gas evolved when sulphur is treated with concentrated nitric acid.
What happens when
Common salt solution is added to silver nitrate solution and NH3 solution add to it.
