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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
Name the gas that is produced in the given cases :
Sulphur is oxidized by concentrated nitric acid.
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.
Name the Following:
Product obtained by the catalytic oxidation of ammonia.
Write the balanced equation for the following:
Action of concentrated nitric acid on copper.
Write the balanced equation for the following:
Action of heat on AgNO3
Write down the word equation or balanced equation for the action of concentrated nitric acid on copper.
Choose the correct word from the given options to complete the sentence :
Sulphur can be converted to sulphuric acid using __________ nitric acid.
Write the equation to show the reaction between the following:
Between copper and concentrated nitric acid.
From the formulae listed below, Choose, one, corresponding to the salt having the given description:
AgCl, CuCO3, CuSO4.5H2O, KNO3, NaCl, NaHSO4, Pb(NO3)2, ZnCO3, ZnSO4, 7H2O.
On heating this, salt changes from green to black.
