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WorksheetsStogs GCSE Interleaving Electrolysis S
Total questions: 15
Worksheet time: 8mins
Why is cryolite used during the production of aluminium from its oxide by electrolysis?
It lowers the melting point of aluminium oxide.
It increases the melting point of aluminium.
It increases the temperature.
What solution is produced by the electrolysis of sodium chloride?
Sodium chloride
Sodium oxide
Sodium hydroxide
Look at the equation: X+ + e- → X. Is this oxidation or reduction?
Oxidation
Reduction
A student carried out electrolysis on copper sulphate (CuSO4) solution. Which ions are attracted to the anode?
Copper ions and hydrogen ions.
Oxygen ions and sulphur ions.
Hydrogen ions and hydroxide ions.
Sulphate ions and hydroxide ions.
What is formed at the anode from the electrolysis of sodium iodide solution?
Sodium
Iodine
Oxygen
Hydrogen
What is formed at the cathode from the electrolysis of molten zinc chloride?
Zinc
Chlorine
Hydrogen
Oxygen
What is the product at the anode from the electrolysis of copper (II) chloride solution?
Copper
Chlorine
Hydrogen
Oxygen
What is the product at the cathode from the electrolysis of dilute hydrochloric acid?
Hydrogen
Chlorine
Oxygen
Hydroxide
What is the product at the anode from the electrolysis of magnesium sulphate solution?
Magnesium
Sulphate
Hydrogen
Oxygen
What is the product at the cathode from the electrolysis of sodium hydroxide solution?
Sodium
Hydrogen
Oxygen
Hydroxide
Positive ions move towards the negative electrode. Does oxidation or reduction then occur at this electrode?
Oxidation
Reduction
Which of the following solutions would deposit a metal at the cathode during electrolysis?
KBr
CaCl2
FeBr2
CuCl2
What is the half-equation for the production of hydrogen gas at the cathode?
H+ + e- → H
H → H+ + e-
2H+ + 2e- → H2
H2 → 2H+ + 2e-
What is the half-equation for the production of oxygen at the anode?
2O2- → 2O2 + 4e-
O2- → O + 2e-
4OH- → 2H2O + O2 + 4e-
2OH- → H2O + O + 2e-
What is the half-equation for the deposition of aluminium at the cathode?
Al → Al+ + e-
Al+ + e- → Al
Al2+ + 2e- → Al
Al3+ + 3e- → Al
