Which of the following metals cannot extracted from its ore by using carbon (ll) oxide as the reducing agent?

  • A Cu
  • B Zn
  • C Al
  • D Pb
  • E Fe
waec 1988chemistry

The correct answer is C. Al

This is because aluminium is more reactive than carbon, and carbon cannot displace it from its oxide.

 Aluminium oxide (Al<sub>2</sub>O<sub>3</sub>) can only be extracted by electrolysis, which is a more expensive and energy-intensive method.

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