NYGH - Acids and Bases

Which of the following metals will react with dilute acid?

• iron

• copper

• silver

• gold

Which of the following reactions will not produce a gas?

• calcium carbonate + ethanoic acid

• barium oxide + citric acid

• ammonium sulfate + sodium hydroxide

• magnesium + sulfuric acid

A gas produced from a reaction was bubbled into limewater. A white precipitate was formed.

What is the formula of the white precipitate?

• Ca(OH)₂

• CaO

• CaCO₃

• CO₂

Which of the following is not a use of sulfuric acid?

• fertiliser

• detergent

• in car batteries

• food preservative

Which of the following statements must be true for all acids in aqueous solution?

• Their pH value is less than 7.

• They completely ionise to produce hydrogen ions.

• They react with all metals to produce hydrogen gas.

• Dibasic acids are stronger than monobasic acids.

Which of the following pairs of substances cannot react with each other?

• Limewater & aqueous ammonium sulfate

• Dilute nitric acid & calcium hydrogencarbonate

• Aqueous sodium hydroxide & zinc oxide

• Aqueous potassium chloride & magnesium oxide

An accident occurred in a school chemistry laboratory and some nitric acid was spilled. Which substance, when added in excess, will neutralise the acid without leaving behind an alkaline solution?

• Aqueous ammonia

• Calcium carbonate

• Sodium hydroxide

• Water

In which reaction is hydrochloric acid not behaving as an acid?

• HCl + AgNO₃ → AgCl + HNO₃

• 2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂

• 2HCl + CuO → CuCl₂ + H₂O

• 2HCl + Fe → FeCl₂ + H₂

Which of the following statements about aqueous calcium hydroxide are true? (multiple answers)

• It conducts electricity.

• It turns Universal Indicator red.

• It liberates ammonia gas when heated with an ammonium salt.

• It liberates carbon dioxide when reacted with aqueous sodium carbonate.

Which of the following is a neutralization reaction?

• 2H₂ + O₂ → 2H₂O

• KCl + AgNO₃ → AgCl + KNO₃

• KOH + HCl → KCl + H₂O

• K₂CO₃ + H₂SO₄ → K₂SO₄ + CO₂ + H₂O