Trivia Quiz On Chemistry For 10th Grade

11 Questions

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Trivia Quiz On Chemistry For 10th Grade

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Questions and Answers
  • 1. 
    A positive test for nitrate ions would give which of the following observations?
    • A. 

      A lemon-yellow colour when hot and turns to white when cool

    • B. 

      A pale yellow precipitate

    • C. 

      A dirty green precipitate

    • D. 

      Damp red litmus paper turning blue

  • 2. 
    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...
    • A. 

      Chloride ions

    • B. 

      Bromide ions

    • C. 

      Iodide ions

    • D. 

      Chlorine ions

  • 3. 
    The copper oxide that is produced when copper carbonate is heated is what colour?
    • A. 

      White

    • B. 

      Green

    • C. 

      Black

    • D. 

      Purple

  • 4. 
    How do we test for sulfate ions?
    • A. 

      Add dilute nitric acid

    • B. 

      Heat and look for colour changes

    • C. 

      Add hydrochloric acid and barium chloride solution

    • D. 

      Add sodium hydroxide and warm it, then add aluminium powder

  • 5. 
    How do we test for sulfate ions?
    • A. 

      Add dilute nitric acid

    • B. 

      Heat and look for colour changes

    • C. 

      Add hydrochloric acid and barium chloride solution

    • D. 

      Add sodium hydroxide and warm it, then add aluminium powder

  • 6. 
    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?
    • A. 

      Lithium

    • B. 

      Sodium

    • C. 

      Potassium

    • D. 

      Calcium

  • 7. 
    If ammonia gas is produced when sodium hydroxide is added to an unknown solution, what ions were present in the unknown solution?
    • A. 

      Ammonium + ions

    • B. 

      Ammonium - ions

    • C. 

      Copper 2+ ions

    • D. 

      Iron 3+ ions

  • 8. 
    What is used to identify an unsaturated compound?
    • A. 

      Bromine water

    • B. 

      Dilute nitric acid

    • C. 

      Barium sulfate

    • D. 

      Aluminium powder

  • 9. 
    If iodine solution is added to ethane, what observation would be made?
    • A. 

      Remains brown

    • B. 

      Changes from brown to black

    • C. 

      Changes from brown to purple

    • D. 

      Changes from brown to brick red

  • 10. 
    Some metal ions form coloured precipitates with sodium hydroxide. Which metal ion forms a light blue precipitate when reacted with sodium hydroxide?
    • A. 

      Copper (II) ions

    • B. 

      Iron (II) ions

    • C. 

      Iron (III) ions

    • D. 

      Cobalt ions

  • 11. 
    Which of the following ions dissolves in excess sodium hydroxide solution?
    • A. 

      Magnesium 2+

    • B. 

      Aluminium 2+

    • C. 

      Calcium 2+

    • D. 

      Aluminium 3+