O-LevelChemistryElectrolysis5070/12 · May/June 2019 · Q141 Mark

When concentrated aqueous sodium chloride is electrolysed using inert electrodes, which product is formed at the cathode and which product is formed at the anode?

Ahydrogen chlorine

Bhydrogen oxygen

Csodium chlorine

Dsodium oxygen

✓ Correct answer

A: hydrogen chlorine

Oracle Prep sorts past-paper questions by topic, so you can drill Electrolysis and see which topics are most likely to come up next.

Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2019 Paper 1 Variant 2, question 14.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Aqueous copper(II) sulfate is electrolysed using copper electrodes. The current is constant and the anode (positive e…

In the extraction of aluminium by electrolysis, its oxide is dissolved in molten cryolite. Cryolite is a sodium salt.…

A concentrated aqueous solution of sodium chloride is electrolysed. What are the equations for the reactions taking p…

The boiling points of gaseous elements increase as the size of their atoms increases. Which of these noble gases has …

The sentence describes two metals and their oxides. Metal X could be copper because its oxide is ......1.... and meta…

Which gas could be used to convert copper(II) oxide to copper?