C12- Chemical Analysis

Question 1

Test for hydrogen

Answer 1

Hold a lighted wooden spling near the open end of a test tube.
If hydrogen is present, it burns with a squeaky pop

Question 2

Test for Oxygen

Answer 2

Hold a glowing wooden splint inside a test tube
If oxygen is present, the splint relights

Question 3

Test for Carbon Dioxide

Answer 3

Shake the gas with limewater
If carbon dioxide is present, the limewater turns milky.

Question 4

Test for chlorine

Answer 4

Put damp litmus paper into the gas
If chlorine is present, the litmus is bleached and the paper turns white