Chemistry
With respect to the laboratory preparation of HCl gas, answer the following questions :
(a) Name the reactants used and the product(s) formed.
(b) Under what conditions do the reactants react?
(c) How is the gas identified?
(d) State the precautions to be taken.
Related Questions
In the laboratory preparation of hydrochloric acid, hydrogen chloride gas is dissolved in water.
(i) Draw a diagram to show the arrangement used for the absorption of HCl gas in water.
(ii) State why such an arrangement is necessary? Give two reasons for the same.
(iii) Write balanced chemical equations for the laboratory preparation of HCl gas when the reactants are :
(A) below 200°C
(B) above 200°C
Explain why :
(a) hydrogen chloride gas is not collected over water.
(b) hydrogen chloride gas cannot be dried over quick lime.
(c) thick white fumes are formed when a glass rod dipped in NH4OH is brought near the mouth of a bottle full of HCl gas.
(d) HCl fumes in air.
Hydrogen chloride molecule is:
- Polar covalent
- Non polar
- Ionic
- Co-ordinate
Choose the correct answer:
Hydrogen chloride gas being highly soluble in water is dried by :
- Anhydrous calcium chloride
- Phosphorous pentaoxide
- Quick lime
- Conc. sulphuric acid.