O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2012 · Q221 Mark

The following statements about dilute sulfuric acid are all correct. 1 Addition of Universal Indicator shows that the solution has a pH value of less than 7.0. 2 A white precipitate is formed when aqueous barium nitrate is added. 3 The solution reacts with copper(II) oxide, forming a blue solution. 4 The solution turns anhydrous copper(II) sulfate from white to blue. Which two statements confirm the acidic nature of the solution?

A1 and 2

B1 and 3

C2 and 4

D3 and 4

✓ Correct answer

B: 1 and 3

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2012 Paper 1 Variant 1, question 22.

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