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Chemistry

Collection of gases

Non-metals and their compounds
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Gases heavier than Air are collected by Downward delivery/Upward displacement
;Those lighter than Air are collected by upward delivery/downward displacement..

Unlike solids and liquids, at least ideally, a mole of any gas at standard conditions has a volume of 22.4 liters. Since air is 78% nitrogen (Mol. wt. 28) and 21% oxygen (mol. wt. 32) air itself has an average mol. wt. of around 29 (I’m too lazy to do the math, but you can). So any gas that has a higher molecular weight than that would be heavier than air. Ar is 40, CO2 44, etc.

Which of these gases is collected by upward delivery

A)NH3
B)HCL
C)CL
D)O2

PS:this is method we use to collect gases soluble in water



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