C2 Chemical resources

1. Which two materials rust?

  • Zinc and aluminuim
  • Aluminium and steel
  • Iron and steel
  • Iron and tin
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2. What causes euthrophication?

  • Aerobic bacteria using up oxygen and feeding on decaying plants
  • Sunlight not getting through the plants and the plants dying
  • Fertilisers being washed off fields into rivers and ponds
  • Algae bloom

3. What are special about smart alloys?

  • They can change colour
  • They return to their original shapes after being heated up
  • Their properties can change depending on their jobs
  • They can be used in more than one thing

4. What can sodium hydroxide and chlorine be used to make?

  • Swimming pool sterilisers
  • Solvents and medicines
  • Margarine and butters
  • More brine

5. What is the catalyst made from in the Haber process?

  • Lead
  • Iron
  • Copper
  • Hot phosphoric acid

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