O-LevelChemistryMetals & Reactivity5070/11 · Oct/Nov 2016 · Q261 Mark

Aqueous copper(II) sulfate solution is placed in an iron container and left to stand for several days. Which statement describes what happens?

AAtmospheric oxygen reacts with the copper(II) sulfate to give black copper(II) oxide.

BSome fine iron particles are formed in the solution.

CThe part of the container in contact with the solution is coated with copper.

DThe solution turns from green to blue.

✓ Correct answer

C: The part of the container in contact with the solution is coated with copper.

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2016 Paper 1 Variant 1, question 26.

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