Chemistry · Oct / Nov 2016 · Paper 11 · Question 14
5070Electrolysis
Aqueous copper(II) sulfate is electrolysed using copper as the positive electrode and carbon as the negative electrode. Which row gives correct information about this electrolysis?
- Aelectrode dissolves | copper deposited | stays a constant blue colour
- Belectrode dissolves | hydrogen gas given off | blue colour becomes more intense
- Chydrogen gas given off | oxygen gas given off | stays a constant blue colour
- Doxygen gas given off | hydrogen gas given off | stays a constant blue colour
As printed in the paper
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Correct answer: A. electrode dissolves | copper deposited | stays a constant blue colour
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