O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2022 · Q251 Mark

Which statement about acids and bases is correct?

AAll strong acids react with carbonates but all weak acids do not.

BThe oxides of Group I metals are amphoteric.

CThe pH of 1.0 mol/dm³ ethanoic acid, CH3COOH, is higher than the pH of 1.0 mol/dm³ sulfuric acid, H2SO4.

DThe pH of 1.0 mol/dm³ nitric acid, HNO3, is lower than the pH of 1.0 mol/dm³ hydrochloric acid, HCl.

✓ Correct answer

C: The pH of 1.0 mol/dm³ ethanoic acid, CH3COOH, is higher than the pH of 1.0 mol/dm³ sulfuric acid, H2SO4.

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2022 Paper 1 Variant 1, question 25.

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