(a) State the method of collecting gases which are denser than air.
(b) Name two gases that can be used to perform the fountain experiment in the laboratory. State the physical property which makes it suitable for the experiment.
(a) Gasses denser than air can be collected by upward displacement of air or downward delivery.
(b) Hydrogen chloride and ammonia are restively used to person the fountain experiment because of their high solubility in water
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