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3.4 Electrolysis

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Question 15

Two graphite electrodes are dipped into an electrolyte and connected to a d.c. power supply.

A glowing splint relights in the gas collected from the positive electrode. When a lit splint is held at the mouth of the tube of gas from the negative electrode, there is a squeaky pop.

Which electrolyte gives these results?

[1]
A

Potassium iodide solution

B

Copper(II) sulfate solution

C

Sodium nitrate solution

D

Silver nitrate solution

Markscheme

3.4 Electrolysis Questions

  1. GCSE
  2. /Chemistry
  3. /3.4 Electrolysis

98 exam-style questions on OCR GCSE Chemistry 3.4 Electrolysis, covering 3.4.1 Products formed at the electrodes in electrolysis and 3.4.2 The technique of electrolysis. Each one has a worked solution and a mark scheme showing where the marks go.

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