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2. How is concrete made?

  • When cement is mixed with sand and aggregate
  • When cement is mixed with sand and mortar
  • When cement is mixed with sand and calcuim carbonate
  • When cement is mixed with aggregate and mortar

3. What does calcium oxide react with to produce calcium hydroxide?

  • Water
  • Oxygen
  • Carbon dioxide
  • Calcuim carbonate

4. What is limestone made from?

  • Calcuim hydroxide
  • Calcuim carbonate
  • Calcuim oxide
  • Carbon dioxide

5. What is NOT made when carbonates react with acids

  • Water
  • Oxygen
  • Salt
  • Carbon dioxide
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