GCSE Chemistry - How to Test for Gases - Testing for Chlorine / Oxygen / Hydrogen / CO2 #64

This video tutorial explains how to test for four gases: chlorine, oxygen, hydrogen, and carbon dioxide. The chlorine test involves using damp blue litmus paper, which turns white if chlorine is present. The oxygen test uses a glowing splint that relights in the presence of oxygen. For hydrogen, a burning splint produces a squeaky pop sound. The carbon dioxide test involves bubbling the gas through lime water, which turns cloudy if carbon dioxide is present. Safety precautions, such as wearing a mask when testing chlorine, are also discussed.

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