Same chapter3 marksDifficulty: Medium
What is aqua regia? State its composition and one use.
Study of Compounds: Hydrogen Chloride
3 marksDifficulty: Medium
Why is hydrogen chloride gas not collected over water, and how is it dried?
Original Khojo Papers practice question — not from a past board paper.
Answer
Hydrogen chloride is extremely soluble in water, so it would dissolve instead of being collected. It is collected by the upward displacement of air because it is denser than air, and it is dried by passing it through concentrated sulphuric acid.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Phosphorus pentoxide cannot be used as the drying agent because it reacts with hydrogen chloride.
Related questions
From the same topic and chapter, at a similar level.
Same chapter2 marksDifficulty: Medium
Why does hydrochloric acid not liberate hydrogen from copper?
Study of Compounds: Hydrogen Chloride
Same chapter3 marksDifficulty: Medium
Write the equation for the laboratory preparation of hydrogen chloride gas from sodium chloride, and state the temperature used.
Study of Compounds: Hydrogen Chloride
Same chapter3 marksDifficulty: Medium
Describe the fountain experiment with hydrogen chloride and state what it demonstrates.
Study of Compounds: Hydrogen Chloride
Same chapter3 marksDifficulty: Medium
How would you distinguish between dilute hydrochloric acid and dilute sulphuric acid using a solution of barium chloride?
Study of Compounds: Hydrogen Chloride
Same chapter2 marksDifficulty: Medium
Write the equation for the reaction of dilute hydrochloric acid with silver nitrate solution and state the observation.
Study of Compounds: Hydrogen Chloride