tests for substances

Question 1

what is the test for chlorine?

Answer 1

damp litmus paper turns from blue to red

Question 2

what is the test for hydrogen?

Answer 2

plunge a lit splint into a test tube and you will hear a squeaky pop

Question 3

what is the test for carbon dioxide?

Answer 3

bubble the gas through limewater and if the limewater goes cloudy then carbon dioxide is present

Question 4

what is the test for oxygen?

Answer 4

plunge a glowing splint into a test tube if it relights oxygen is present

Question 5

what is the test for alkenes?

Answer 5

bromine water turns from brown to colourless

Question 6

how can you test for pure water?

Answer 6

test for chloride ions so do a pH test