Gas Tests

Question 1

Test for hydrogen gas?

Answer 1

Place a burning splint into contact with the gas

Question 2

What is the positive result for a hydrogen gas test?

Answer 2

A ‘pop’ is produced

Question 3

What is the test for oxygen?

Answer 3

Place a glowing splint into contact with the gas

Question 4

What is the positive result for an oxygen test?

Answer 4

The splint relights

Question 5

What is the test for chlorine?

Answer 5

Moisten litmus paper / universal indicator paper and place into contact with gas

Question 6

What is the positive test for chlorine?

Answer 6

Changes red then bleaches

Question 7

Test for carbon dioxide?

Answer 7

Bubble gas produced through limewater

Question 8

What is the positive result for carbon dioxide

Answer 8

Limewater turns cloudy/milky

Question 9

Test for sulfur dioxide?

Answer 9

Bubble gas through potassium dichromate salutation.

Question 10

Positive result for sulfur dioxide?

Answer 10

Changes from orange to green

Question 11

What is the test for hydrogen chloride?

Answer 11

Dip a glass rod in concentrated ammonia and place in contact with gas / moisten universal indicator paper and place in contact with the gas

Question 12

Positive test for hydrogen chloride

Answer 12

Gas rod = white fumes produced

Universal indicator = turns red

Question 13

Test for ammonia?

Answer 13

Dip a glass rod in concentrated hydrochlorlic and place in contact with the gas / moisten universal indicator paper and place in contact with the gas

Question 14

Positive test for ammonia?

Answer 14

Glass rod = white fumes

Universal indicator = changes to blue