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प्रश्न
Why is the temperature maintained at 200°C in the above reaction?
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उत्तर
The temperature is maintained at 200°C in the above reaction to avoid following problems:
- Nitric acid would decompose at high temperature.
- Potassium or sodium sulphate is formed which will stick to the walls of glass and cannot be removed be easily.
- The glass apparatus may break at high temperature.
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संबंधित प्रश्न
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
Write a balanced equation for the action of heat on a mixture of copper and concentrated nitric acid.
Name the products formed when dilute HNO3 is added to copper.
Give two chemical equations for the following:
Nitric acid acting as the oxidizing agent.
What is the purpose of Conc. H2SO4 in the above preparation?
Brown ring disappear if the test tube is disturbed.
Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid.
- Name A (a liquid), B (a solid), and C (a liquid). (Do not give the formulae.)
- Write an equation to show how nitric acid undergoes decomposition.
- Write the equation for the reaction in which copper is oxidised by concentrated nitric acid.
