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6. What can limestone be used to make?

  • Calcium oxide and concrete
  • Cement and calcium oxide
  • Concrete
  • Calcium oxide
  • Cement

7. What two metal carbonates can a bunsen burner not decompose due to it not being hot enough?

  • Lithium & Sodium
  • Sodium & Calcium
  • Potassium & Sodium
  • Calcium & Potassium

8. How is mortar made?

  • Cement is mixed with sand and water
  • Cement is mixed with sand, aggregate and water
  • Aggregate is mixed with water
  • Water is mixed with sand

9. What is thermal decomposition?

  • The breaking down of a compound by heating
  • The burning of a compound
  • The breaking down of a solution through heating and evaporating

10. What can limestone be used as? (On it's own)

  • To hold bricks together
  • A building material
  • Calcium carbinate

11. What is the chemical symbol for calcium carbonate?

  • CaCO3
  • CaCO
  • Ca2C2
  • Ca4CO2

12. What solution do farmers use to neutralise their soils?

  • Water
  • Calcium carbonate
  • Calcium hydroxide
  • Oxygen

13. What three things are mixed with cement to make concrete?

  • Aggregate, water, glue
  • Sand, aggregate and water
  • Sand, water, and pebbles

14. How is cement made?

  • By mixing aggregate, sand and water and then heating it in a kiln
  • By mixing clay and sand
  • By mixing limestone and clay, and then heating it in a kiln
  • By mixing clay and water

15. What happens when calcium hydroxide reacts with carbon dioxide?

  • Produces a salt and water
  • Produces calcium carbonate
  • Produces water and calcium carbonate
  • Produces water
  • Produces carbon dioxide

16. All metals react in _______ _____ when heated or reacted with acids..

  • Exact same ways
  • Similar ways
  • Different ways

17. What is the chemical symbol for calcium oxide?

  • CaO3
  • CO2
  • CaO
  • CaCO

18. What is limewater used for?

  • To neutralise soils
  • To test for carbon dioxide
  • To neutralise acids
  • To test for oxygen

19. Is calcium hydroxide and acid, alkali, or none of the following?

  • Alkali
  • Acid
  • None of the following

20. What happens to calcium carbonate when it is strongly heated?

  • It decomposes
  • It neutralises
  • It stays the same