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Chemistry · Oct / Nov 2017 · Paper 11 · Question 15

5070Electrolysis

When aqueous copper(II) sulfate is electrolysed using copper electrodes, which observations are correct?

  1. Aelectrode becomes smaller; electrode becomes bigger; constant
  2. Belectrode becomes smaller; gas given off; fades
  3. Cgas given off; electrode becomes bigger; fades
  4. Dgas given off; gas given off; constant

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Correct answer: A. electrode becomes smaller; electrode becomes bigger; constant

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