Chemistry · Oct / Nov 2016 · Paper 11 · Question 26
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.
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Correct answer: C. The part of the container in contact with the solution is coated with copper.
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