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JAMB Biology 2005 Question 40

Question 40

Soil

Which of the following is used to test for the presence of lime in a soil sample?

  1. A.H2SO4(aq)
  2. B.NaOH(aq)
  3. C.HCl(aq)
  4. D.HNO3(aq)
Show the answer and explanation

Answer: C (HCl(aq))

Explanation

Lime (calcium carbonate) fizzes, giving off carbon(IV) oxide, when dilute hydrochloric acid is added. Sodium hydroxide is an alkali and gives no fizzing.