Other questions in this quiz

2. During electrolysis the positive metal ions move towards the negative electrode. Why does this happen?

  • Because opposite charges attract
  • Because of the delocalised electrons
  • Due to photosynthesis
  • Due to the negative sea of electrons

3. What can be obtained from solutions of copper salts by electrolysis or by displacement using scrap iron?

  • Bacteria
  • Copper
  • Iron
  • Plants

4. Why are alloys stronger than pure metals?

  • A pure metal is unreactive
  • Alloys are less dense compared to pure metals
  • The metals are different sizes and therefore the layers cannot slide over each other
  • Some metals in the alloy are stonger than others compared to a pure metal

5. Pure copper, gold, iron, aluminium are too soft, what are these metals mixed with to make them harder?

  • Bigger amounts of a range of metals
  • Small amounts of similar metals
  • Small amounts of a range of metals
  • Bigger amounts of similar metals

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