(U1) Qualitative Tests

Question 1

What happens in a gas test with H₂

Answer 1

Gives a ‘pop’ with a burning splint

Question 2

What happens in a gas test with O₂

Answer 2

Relights a glowing splint

Question 3

What happens in a gas test with Cl₂

Answer 3

Bleaches damp litmus/ universal indicator paper

Question 4

What happens in a gas test with CO₂

Answer 4

Bubble through limewater, limewater turns milky

Question 5

What happens in a gas test with HCL (4)

Answer 5

• White Fumes
• Smoke
• Solid with stopper from bottle of ammonia solution
• glass rod dipped in concentrated ammonia solution

Question 6

What happens in a gas test with NH₃ (4)

Answer 6

• White Fumes
• Smoke
• Solid with stopper from bottle of concentrated ammonia
• Glass rod dipped in concentrated Hydrochloric acid