Q.1
If dilute nitric acid and silver nitrate are added to an unknown solution and a cream precipitate appears, we can tell that the ions that are present are...
  • chloride ions
  • bromide ions
  • iodide ions
  • chlorine ions
Q.2
Flame tests can be used to identify metals in groups 1 and 2 of the Periodic Table. Which metal burns with an intense yellow/orange flame?
  • Lithium
  • Sodium
  • Potassium
  • Calcium
Q.3
Which of the following ions dissolves in excess sodium hydroxide solution?
  • Magnesium 2+
  • Aluminium 2+
  • Calcium 2+
  • Aluminium 3+
Q.4
The copper oxide that is produced when copper carbonate is heated is what colour?
  • White
  • Green
  • Black
  • Purple
Q.5
If ammonia gas is produced when sodium hydroxide is added to an unknown solution, what ions were present in the unknown solution?
  • Ammonium + ions
  • Ammonium - ions
  • Copper 2+ ions
  • Iron 3+ ions
Q.6
A positive test for nitrate ions would give which of the following observations?
  • A lemon-yellow colour when hot and turns to white when cool
  • A pale yellow precipitate
  • A dirty green precipitate
  • Damp red litmus paper turning blue
Q.7
Some metal ions form coloured precipitates with sodium hydroxide. Which metal ion forms a light blue precipitate when reacted with sodium hydroxide?
  • Copper (II) ions
  • Iron (II) ions
  • Iron (III) ions
  • Cobalt ions
Q.8
What is used to identify an unsaturated compound?
  • Bromine water
  • Dilute nitric acid
  • Barium sulfate
  • Aluminium powder
Q.9
How do we test for sulfate ions?
  • Add dilute nitric acid
  • Heat and look for colour changes
  • Add hydrochloric acid and barium chloride solution
  • Add sodium hydroxide and warm it, then add aluminium powder
Q.10
If iodine solution is added to ethane, what observation would be made?
  • Remains brown
  • Changes from brown to black
  • Changes from brown to purple
  • Changes from brown to brick red
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