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WAEC Biology 2020 Question 22

Question 22

Respiration

The reagent used in testing for carbon (IV) oxide is

  1. A.copper sulphate solution.
  2. B.lime water.
  3. C.hydrochloric acid.
  4. D.sodium hydroxide solution.
Show the answer and explanation

Answer: B (lime water.)

Explanation

Carbon (IV) oxide turns clear lime water milky.