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प्रश्न
How will you prepare the following from nitric acid?
Aqua regia
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उत्तर
A mixture of 3 parts conc. HCl and one part conc. HNO3 is called aqua regia. It gives nascent chlorine and can dissolve gold and platinum [noble metals].
\[\ce{HNO3 + 3HCl -> NOCl +2H2O +2[Cl]}\]
संबंधित प्रश्न
Ammonia is used in the Ostwald process.
Why is quartz used in this process?
Write a balanced equation and name the products formed when zinc reacts with dilute nitric acid.
The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
Name the process used for the manufacture of nitric acid.
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Give reason for the following:
Conc. Nitric acid renders iron passive.
Give reason for the following:
Aqua regia dissolves gold and platinum.
What do you observe when?
Scrap zinc is heated with conc. HNO3?
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Write the equation for the reaction of dilute nitric acid with copper.
