iGCSE CHEMISTRY EDEXCEL: CHEMICAL TESTS

1. What gas produces a 'pop' sound when a lit splint is applied?

• Oxygen
• Hydrogen
• Carbon dioxide
• Chlorine

2. Which gas relights a glowing splint?

• Hydrogen
• Oxygen
• Ammonia
• Carbon dioxide

3. What gas turns limewater milky?

• Oxygen
• Ammonia
• Carbon dioxide
• Chlorine

5. What gas bleaches damp litmus paper?

• Hydrogen
• Oxygen
• Carbon dioxide
• Chlorine

6. What color does lithium produce in a flame test?

• Yellow
• Red
• Lilac
• Blue-green

7. What color does sodium produce in a flame test?

• Yellow
• Red
• Lilac
• Blue-green

8. What color does potassium produce in a flame test?

• Yellow
• Red
• Lilac
• Blue-green

9. What color does calcium produce in a flame test?

• Orange-red
• Red
• Lilac
• Blue-green

10. What color does copper(II) produce in a flame test?

• Yellow
• Red
• Lilac
• Blue-green

11. What gas is evolved when ammonium ions react with sodium hydroxide?

• Hydrogen
• Oxygen
• Ammonia
• Carbon dioxide