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प्रश्न
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. State the reason.
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उत्तर
Nitric acid forms a constant boiling mixture with water containing 68% acid. This mixture boils constantly at a constant boiling point without any change in its composition. At this temperature, gas and water vapour escape together. Hence, the composition of the solution remains unchanged. So nitric acid cannot be concentrated beyond 68% by distillation of the dilute solution of HNO3.
संबंधित प्रश्न
Give a balanced chemical equation for Action of conc. Nitric acid on Sulphur
State one relevant observation for the following:
When crystals of copper nitrate are heated in a test tube.
Name the gas that is produced in the given case:
The action of cold and dilute nitric acid on copper
What is aqua fortis?
What is : aqua regia
Give reasons for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly above 200°C.
Write a balanced equation and name the products formed when sodium hydrogen carbonate is added to nitric acid.
Write a balanced equation and name the products formed when concentrated nitric acid is heated.
Write the balanced equation for the following:
Action of heat on AgNO3
Fill in the blank using the appropriate words given below:
Cold, dilute nitric acid reacts with copper to give ______.
