Which of the following gases can be collected by the upward displacement of air?
NO
H 2
NH3
Cl 2
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Upward displacement of air is good for gases
that are heavier/denser than air, and are soluble
in water.
Examples are carbon dioxide, hydrogen
chloride, sulfur dioxide and chlorine.
As a general guide, a gas is less dense than air if
its molecular mass is less than 30, so you should
be looking at gases with Mr more than 30!

The answer is C, and chlorine cannot be collected by the upward displacement of air because the molar mass is greater than 29

D is clearly the answer here. this is because gases with a molecular mass greater than 29g/mol are denser than air(meaning they sink in air)
A; NO= 30g/mol
B; H2= 2g/mol
C; NH3= 17g/mol
D; CL2= 71g/mol
the answer would be D: Chlorine(Cl2)

upward displacement is used for gases soluble in water but less dense than air. Ammonia NH3 is the correct option.
But Chlorine Is A Poisonous Gas,it Shud Be Produced In A Fume Cupboard, Besides Its 2.5times Denser Than Air.



