WAEC Chemistry questions: Acids, bases and salts

26 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Acids, bases and salts· WAEC

   Which indicator is most suitable for titrating a strong acid against a weak base?

   • Apotassium manganate(VII)
   • Bphenolphthalein
   • Cstarch
   • Dmethyl orange

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   Explanation and discussion

2. Question 22· Acids, bases and salts· WAEC

   An acid turns blue litmus paper

   • Acolourless
   • Bgreen
   • Cyellow
   • Dred

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   Explanation and discussion

3. Question 23· Acids, bases and salts· WAEC

   Zinc granules react with dilute hydrochloric acid to give

   • Azinc oxide and chlorine
   • Bzinc chloride and hydrogen
   • Czinc chloride and water
   • Dzinc hydroxide and hydrogen

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4. Question 24· Acids, bases and salts· WAEC

   Which salt is insoluble in water?

   • Abarium sulphate
   • Bsodium chloride
   • Cpotassium nitrate
   • Dammonium chloride

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5. Question 25· Acids, bases and salts· WAEC

   Pure water at 25 °C has a pH of

   • A14
   • B0
   • C7
   • D1

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6. Question 26· Acids, bases and salts· WAEC

   What volume of 0.1 mol/dm³ NaOH will exactly neutralise 25 cm³ of 0.1 mol/dm³ HCl?

   • A2.5 cm³
   • B50 cm³
   • C12.5 cm³
   • D25 cm³

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   Explanation and discussion