Core Chemistry Topics 3&4

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1. What products will be made when reacting hydrchloric acid + sodium hydroxide?

  • sodium chloride
  • sodium + hydrogen
  • Sodium chloride + water
  • sodium chloride + water +carbon dioxide
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2. Why do metals rust?

  • because it has been exposed to too much water
  • because it has been exposed to too much carbon dioxide
  • because the metal is being oxidised (gain of oxygen)
  • because the metal has lost oxygen (reduction)

3. What is the test for oxygen?

  • relights a glowing splint
  • bleaches damp litmus paper white
  • makes a squeaky pop with a lighted splint

4. What is produced after the electrolysis of salt?

  • chlorine
  • carbon dioxide
  • hydrogen
  • oxygen

5. What is the name of a smart alloy used in glasses frames and to repair damaged blood vessels?

  • iron
  • nitinol
  • steel

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