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JAMB Chemistry 1983 Question 24

Question 24

Environmental Pollution

Crude petroleum pollutant usually seen on some Nigerian creeks and waterways can be dispersed or removed by

  1. A.heating the affected parts in order to boil off the petroleum
  2. B.mechanically stirring to dissolve the petroleum in water
  3. C.pouring organic solvents to dissolve the petroleum
  4. D.spraying the water with detergents
  5. E.cooling to freeze out the petroleum.
Show the answer and explanation

Answer: D (spraying the water with detergents)

Explanation

Detergents (dispersants) break the oil slick into tiny droplets that spread through the water and are broken down. Pouring in organic solvents would only add more pollution.