8.2 Identification of common gases

Question 1

Describe the test for hydrogen

Answer 1

A burning splint creates a squeaky pop in the presence of hydrogen

Question 2

Describe the test for oxygen

Answer 2

Glowing splint relights

Question 3

Describe the test for carbon dioxide

Answer 3

Turns limewater (Ca(OH)2) milky

Question 4

Describe the test for chlorine

Answer 4

Bleaches damp litmus paper and makes it white

Question 5

Describe the flame test result for a lithium compound

Answer 5

Crimson red

Question 6

Describe the flame test result for a sodium compound

Answer 6

Yellow

Question 7

Describe the flame test result for a potassium compound

Answer 7

Lilac

Question 8

Describe the flame test result for a calcium compound

Answer 8

Orange-red

Question 9

Describe the flame test result for a copper compound

Answer 9

Green-blue