O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2019 · Q181 Mark

Sodium hydroxide is added to a solution to alter its pH. A neutral solution is formed. Which statement is correct?

ASodium hydroxide is an acid and reacts with an alkali to form water as a product.

BSodium hydroxide will lower the pH of the solution.

CThe pH of the neutral solution is 14.

DThe pH of the solution before sodium hydroxide is added is below 7.

✓ Correct answer

D: The pH of the solution before sodium hydroxide is added is below 7.

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 1, question 18.

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