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Question
Study the figure given below and answer the questions which follow:

- Identify the gas Y.
- What property of gas Y does this experiment demonstrate?
- Name another gas which has the same property and can be demonstrated through this experiment.
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Solution
- The gas Y is HCl (hydrogen chloride).
- The fountain experiment demonstrates the extreme solubility of hydrogen chloride gas.
- Ammonia gas is another gas that has the same property and can be demonstrated through this experiment.
RELATED QUESTIONS
When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.
When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.
The aim of the Fountain experiment is to prove that ______.
Name the following:
Gas obtained by treating metals with hydrochloric acid.
Name the drying agent used to dry HCl gas.
How can you prove that hydrochloric acid contain :
Chlorine?
Dilute hydrochloric acid is added in turn to a mixture of iron and sulphur and to the compound formed between iron and sulphur. Name the gas formed in each case.
Hydrogen chloride dissolves in water to form an acidic solution.
Name the experiment which demonstrates that hydrogen chloride is very soluble in water.

The diagram shows an apparatus for the laboratory preparation of hydrogen chloride.
(i) Identify A and B
(ii) Write the equation for the reaction
(iii) How would you check whether or not the gas jar is filled with hydrogen chloride?
(iv) What does the method of collection tell you about the density of hydrogen chloride.
- Name the experiment illustrated below.
- State the colour of the water that has entered the round-bottomed flask.

State the following:
The drying agent used in the laboratory preparation of HCl gas.
