Other questions in this quiz

2. Equation at the Cathode

  • Al3+ + 3e- → Al
  • 2O2- → O2 + 4e-
  • Al2+ + 2e- → Al
  • Al3+ + 2e- → Al

3. Disadvantages of using hydrogen to extract tungsten

  • Takes a long time
  • Gives tungsten impurities
  • Very expensive and Hydrogen is highly expolsive
  • Produces CO2 which is a greenhouse gas

4. Name 3 metals extracted from their ores by reduction by Carbon

  • Iron, manganese and copper
  • Titanium, Aluminium and copper
  • Copper, Iron, Aluminium
  • Titanium, Tungsten and Aluminium

5. How the melting point of Aluminium Oxide is reduced?

  • Dissolving Aluminium oxide in molten cryolite
  • Dissolving it in water
  • Reducing it with carbon
  • Melting it

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