Gas tests

Question 1

What is the test for hydrogen?

Answer 1

A lighted splint ignites hydrogen with a pop.

Question 2

What is the test for carbon dioxide?

Answer 2

Carbon dioxide turns limewater milky or cloudy white.

Question 3

What is the test for oxygen?

Answer 3

A glowing splint relights in a test tube containing the gas.

Question 4

What is the test for chlorine?

Answer 4

Damp blue litmus paper exposed to the gas turns red then white.