Tests For Gases

Question 1

Test for Hydrogen

Answer 1

A lighted wooden splint makes a popping sound in a test tube of hydrogen.

Question 2

Test for Oxygen

Answer 2

A glowing wooden splint relights in a test tube of oxygen.

Question 3

Test for Carbon Dioxide

Answer 3

Carbon dioxide turns limewater milky. A lighted wooden splint goes out in a test tube of carbon dioxide but this happens with other gases, too. So the limewater test is a better choice.