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Question
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?
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Solution
When hydrogen chloride is collected by downward delivery or upward displacement, it shows that it is heavier than air.
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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.
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Gas obtained by treating metals with hydrochloric acid.
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Name the experiment which demonstrates that hydrogen chloride is very soluble in water.

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(ii) Write the equation for the reaction
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The following question is pertaining to the laboratory preparation of hydrogen chloride gas.
Write the equation for its preparation, mentioning the condition required.
The aim of the fountain experiment is to prove that
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Identify the terms for the following:
A method used to collect HCl gas.
