Question

A test tube of ammonia gas is placed above a test tube of air. Ammonia is an alkaline
gas that turns litmus blue. It is lighter than air.
(a) After a short time the red litmus paper turns blue. Explain why.
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(b) Would it make any difference if you reversed the test tubes? Explain your answer.
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because the air particals vibrate because of the heat.
because you are adding more air particles into it as it expands.
because water particals are together but not as much as solids. You cannot squeeze it
because it is full of water as well.
because the air particals can run away because they are free to go everywhere.
because liquid can take any shape of a solid.
because the particals must be having more space to allow them to be poured.
(c) What would you see if the test tube of air was replaced by one containing hydrogen
chloride?
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Answer 1

Answer:

Result: If ammonium ions are present then a pungent-smelling gas is produced. The gas produced turns damp red litmus paper blue. It is ammonia, NH3.