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प्रश्न
In the preparation of nitric acid from KNO3 concentrated sulphuric acid is used in place of hydrochloric acid. Why?
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उत्तर
Concentrated sulphuric acid is used in place of hydrochloric acid because hydrochloric acid is a volatile acid. If used, the nitric acid vapours will carry HCl vapours along with them, making it impossible to get pure nitric acid. Therefore, a non-volatile acid like concentrated sulphuric acid is required.
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संबंधित प्रश्न
Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, nitrogen dioxide, Nitric oxide, Sulphuric acid)
Cold, dilute nitric acid reacts with copper to give ___________.
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 ______________.
What is : aqua regia
- Write a balanced chemical equation for the laboratory preparation of nitric acid.
- In the preparation of nitric acid from KNO3, concentrated hydrochloric acid is not used in place of concentrated sulphuric acid. Explain why?
- Conc. nitric acid prepared in the laboratory is yellow in colour. Why? How is this colour removed?
- 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.
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.
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. State the reason.
Write the balanced equation for the following:
Action of heat on AgNO3
How would you separate gold from a mixture of gold and copper filling?
Write the equation to show the reaction between the following:
Between copper and concentrated nitric acid.
Write sqauential observation for effect of heat on Copper nitrate.
