Advertisements
Advertisements
प्रश्न
Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C
Advertisements
उत्तर
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 because a higher temperature can cause following problems:
1. Nitric acid would decompose to form nitrogen dioxide.
2. Sodium sulphate is formed which may stick to the glass and cannot be removed easily.
3. The glass apparatus may break.
APPEARS IN
संबंधित प्रश्न
Write balanced chemical equations for Action of hot and concentrated Nitric acid on copper
Give two chemical equations for the following:
Reactions of nitric acid with non-metals.
The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
What is the purpose of Conc. H2SO4 in the above preparation?
In which ratio reactants are taken in Ostwald process?
When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate. what is the special feature of the apparatus used?
Write the equation for the reaction of dilute nitric acid with copper.
State, what is observe when nitric acid is kept in a reagent bottle for a long time.
Balanced equation of oxidation of carbon with concentrated HNO3
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.
