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JAMB Chemistry 2014 Question 21

Question 21

Acids, Bases and Salts

Which of the following salts will turn blue litmus red?

  1. A.Sodium tetrahydroxozincate(II).
  2. B.Potassium hydrogentetraoxosulphate(VI).
  3. C.Sodium trioxocarbonate(IV).
  4. D.Zinc chloride hydroxide.
Show the answer and explanation

Answer: B (Potassium hydrogentetraoxosulphate(VI).)

Explanation

KHSO4 is an acid salt: its HSO4− ion releases H+ in water, so the solution is acidic and turns blue litmus red.