Identifying Gases: Tests and Results

The video tutorial explains how to identify four different gases: hydrogen, oxygen, carbon dioxide, and chlorine. For hydrogen, a burning splint is used, which causes a squeaky pop if hydrogen is present. Oxygen is tested with a glowing splint that relights in its presence. Carbon dioxide is identified by its reaction with limewater, turning it cloudy. Chlorine is detected by its ability to bleach damp litmus paper.

What sound indicates the presence of hydrogen when a burning splint is held at the open end of a test tube?

Why is it important to hold the test tube upside down when testing for hydrogen?

How can you test if a gas is oxygen using a glowing splint?

What happens to limewater when carbon dioxide is bubbled through it?

Describe the procedure to test for chlorine gas using litmus paper.