Other questions in this quiz

2. a small amount of tin is added to lead - compared to lead the melting point of the mixture will be

  • higher and less precise
  • lower and less precise
  • higher and more precise
  • unchanged

3. Zn + H2SO4->___+H2 - Which of the following formulae represents the missing salt in the equation

  • H2SO4
  • ZnSO4
  • SO4
  • Zn(OH)4

4. which of the following statements is true

  • copper is used as a roof covering because it is a good conductor of electricity
  • copper is used as a roof covering because it is malleable
  • copper is used as a roof covering because it changes to a green colour
  • copper is used as a roof covering because it conducts heat well

5. when scratched to remove its surface, which of the following metals will react most quickly with the air

  • lead
  • aluminium
  • copper
  • tin

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