Quiz Chapter 6 Acids, Base and Salt

Phosphoric acid is a weak acid that

• has a pH value of 1.0

• cannot neutralise alkaline solution

• changes red litmus paper to blue

• ionises partially in water to produce hydrogen ions

Which chemical equation represents a neutralisation reaction?

• Mg + H₂SO₄ → MgSO₄ + H₂

• ZnCl₂ + 2HNO₃ → Zn(NO₃)₂ + 2HCl

• 2HCl + CaCO₃ → CaCl₂ + CO₂ + H₂O

• NaOH + CH₃COOH → CH₃COONa + H₂O

Which salt is not decomposed when heated strongly?

• Zinc nitrate

• Ammonium chloride

• Potassium carbonate

• Copper(II) sulphate

Which of the following causes alkaline properties of aqueous ammonia solution?

• NH₃

• NH₄⁺

• OH^-

• H⁺

Which of the following pH values is for strong acid solution?

• pH 14

• pH 11

• pH 5

• pH 1

Which of the following ionises partially in water?

• NH₃

• NaOH

• HCl

• HNO₃

Syahid is stung by a bee. Which of the following substances is the most suitable to be applied to the affected area to treat Syahid?

• vinegar

• bicarbonate of soda

• cooking oil

• lemon

Which reactants are suitable to prepare lead (II) chloride?

• Lead and hydrochloric acid

• Lead (II) carbonate powder and hydrochloric acid

• Lead (II) nitrate solution and chlorine gas

• Lead (II) nitrate solution and sodium chloride solution

What is the pH value of nitric acid with 0.5 mol dm^-3 hydrogen ions?

• 0.3

• 0.5

• - 0.3

• - 0.5

What is the pH value of potassium hydroxide solution that contains 0.02 mol dm^-3 hydroxide ions?

• 1.047

• 1.699

• 12.301

• 12.593