Identification Of Common Gasses

Question 1

Test for hydrogen

Answer 1

Squeaky pop test

Place a lit splint close to the mouth of a test tube containing a gass

If the gass is hydrogen a squeaky pop sound will be produced

This is because hydrogen burns rapidly in the presence if oxygen to give h²o

Question 2

Identification of oxygen

Answer 2

Insert a glowing splint into a test tube containing a gass

If the gass us oxygen the splint will relight

Question 3

Identification of carbon dioxide

Answer 3

Take an aqueous solution of limewater and bubble through the gass

If its carbon dioxide the lime water solution will go from clear to cloudy

Question 4

Identification of chlorine

Answer 4

Insert damp litmus paper into test tube containing the gass

If the gass is chlorine the litmus paper will change from red to white