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JAMB Chemistry 1983 Question 44

Question 44

Acids, Bases and Salts

Liquid X, reacts with sodium trioxocarbonate (IV) (Na2CO3) to give a gas which turns calcium chloride solution milky. X is

  1. A.Na2SO4(aq)
  2. B.KI(aq)
  3. C.an alkali
  4. D.an acid
  5. E.a hydrocarbon
Show the answer and explanation

Answer: D (an acid)

Explanation

Acids react with carbonates to release carbon dioxide gas; none of the other substances does this.