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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
Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, nitrogen dioxide, Nitric oxide, Sulphuric acid)
Hot, concentrated nitric acid reacts with sulphur to form ______________.
During thunderstorm, rain water contains nitric acid. Explain with reactions.
In the preparation of nitric acid from KNO3 concentrated sulphuric acid is used in place of hydrochloric acid. Why?
Give reason why concentrated nitric acid prepared in the laboratory is yellow in colour. State how the colour of the acid is removed.
Write a balanced equation and name the products formed when sodium hydrogen carbonate is added to nitric acid.
Identify the substance underlined:
The dilute acid which is an oxidizing agent.
Write down the word equation or balanced equation for the action of concentrated nitric acid on copper.
Fill in the blank using the appropriate words given below:
Cold, dilute nitric acid reacts with copper to give ______.
Write a balanced equation for following :
Action of cold and dilute nitric acid on copper
