Chemistry
(a) The drying agent used to dry HCl gas is:
A. Conc. H2SO4
B. ZnO
C. Al2O3
D. CaO
(b) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the product formed is …………… (Sodium hydrogen sulphate/sodium sulphate/ chlorine).
Hydrogen Chloride
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Answer
(a) Conc. H2SO4
Reason — Drying agent used for drying should only remove the moisture and not react with it, hence, conc. sulphuric acid is used as the drying agent.
(b) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the product formed is sodium hydrogen sulphate
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Related Questions
State your observations:
(a) HCl gas is passed through lead nitrate solution and the mixture is heated.
(b) Hydrochloric acid is added to silver nitrate solution.
(c) Ammonium hydroxide solution is added to the resultant product of part (b).
Distinguish by using HCl.
(a) Lead nitrate solution and silver nitrate solution.
(b) Potassium sulphite and potassium sulphide.
The following questions pertain to the laboratory preparation of hydrogen chloride gas:
(i) Write the equation for it's preparation mentioning the condition required.
(ii) Name the drying agent used in the above preparation and give a reason for the choice.
(iii) State a safety precaution taken during the preparation of hydrochloric acid.
Identify the gas evolved and give the chemical test when dilute hydrochloric acid reacts with :
(i) Sodium sulphite.
(ii) Iron [II] sulphide.