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2. Which of the following is not one of the reasons copper is used at school?

  • It's change in colour from green to black
  • It's change in colour from purple to green
  • Because it is low in the reactivity series

3. When copper carbonate is heated it produces carbon dioxide and what?

  • Copper calcium
  • Copper oxide
  • Copper zinc

4. When a metal is higher in the reactivity series does it need more or less energy?

  • More energy to decompose
  • Less energy to decompose

5. The products of heating carbonates are always what?

  • Metal oxides and carbon dioxide
  • Calcium oxides and carbon dioxide
  • Water and carbon dioxide
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