Other questions in this quiz

2. Equation at the Cathode

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

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

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

4. Why is Titanium not extracted by carbon?

  • It's activation energy's too high
  • It forms titanium Carbide which makes it brittle
  • It's more reactive
  • Its too expensive to use

5. Disadvantage of using carbon to extract iron, copper and manganese

  • Produces CO2 which is a greenhouse gas
  • Very expensive
  • Time consuming
  • Gives metals impurities


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