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JAMB Chemistry 1980 Question 2

Question 2

Metals and their Compounds

The alloy duralumin is used for the building of aeroplanes because it

  1. A.absorbs heat readily from the sun thereby preventing the inside of the plane from getting too cold at high attitudes
  2. B.reflects sunlight readily, thereby keeping the inside of the plane cool
  3. C.is extremely durable and possesses reflective ability
  4. D.is easily the lightest building material
  5. E.possesses both strength and lightness.
Show the answer and explanation

Answer: E (possesses both strength and lightness.)

Explanation

Duralumin (aluminium with copper, magnesium and manganese) is light like aluminium but much stronger, which is what aircraft bodies need.