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Chemistry · Oct / Nov 2024 · Paper 12 · Question 28

5070Uses of metals

Aluminium and copper are good conductors of electricity. Why is aluminium used in overhead electrical cables instead of copper?

  1. AAluminium is above copper in the reactivity series.
  2. BAluminium is less dense than copper.
  3. CCopper does not have an oxide coating.
  4. DCopper reacts with water.

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Correct answer: B. Aluminium is less dense than copper.

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