AQA GCSE Chemistry – Electrolysis Questions with
Correct Answers 2026–2027 | Complete Revision Guide &
Exam Practice Pack
Types of electrolysis - CORRECT ANSWER -Of aqueous ionic compounds
Of molten ionic compounds
Ionic compound - CORRECT ANSWER -
a compound composed of positive(cations) and negative ions(anions)
Why can't ionic compounds conduct electricity as solid? - CORRECT ANSWER -
The electrons aren't free to move and carry the charge through the structure
What is an electrolyte? - CORRECT ANSWER -a liquid/solution that conducts electricity
Define discharge - CORRECT ANSWER -Gain/loss of electrons to become electrically neutral/ an atom
What is the general rule for electrolysis of aqueous solutions regarding which ion gets discharged at eac
h electrode ? - CORRECT ANSWER -The ion that is easiest to discharge will be discharged
How are electrolytes made? - CORRECT ANSWER -by melting or dissolving ionic compounds
What is the a positive electrode called? - CORRECT ANSWER -Anode
What is a negative electrode called? - CORRECT ANSWER -Cathode
reduction - CORRECT ANSWER -gain of electrons
Oxidation - CORRECT ANSWER -loss of electrons
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, Which electrode are cations discharged at ? - CORRECT ANSWER -Cathode
Does oxidation or reduction occur at the cathode? - CORRECT ANSWER -reduction
Cations are discharged at the cathode as they gain electrons to become atoms
Which electrode are anions discharged at? - CORRECT ANSWER -Anode
Does oxidation or reduction occur at the anode? - CORRECT ANSWER -oxidation
Anions are discharged at the anode as they lose electrons to become atoms
How do ions become atoms or molecules? - CORRECT ANSWER -By losing or gaining electrons
How does an electrolysis circuit become complete? - CORRECT ANSWER -
A flow of electrons taken from anode to cathode
How do you measure the conductivity of an electrolyte? - CORRECT ANSWER -With a conductivity probe
In molten ionic compounds there is only - CORRECT ANSWER -one source of ions
In the electrolysis of molten lead bromide what is the half equation for the Pb2+ ions? -
CORRECT ANSWER -Pb2 + 2e --> Pb
In the electrolysis of molten lead bromide what is the half equation for the Br- ions? -
CORRECT ANSWER -2Br- -->Br2 + 2e
What is an electric current? - CORRECT ANSWER -the flow of electrons
What is a covalent bond? - CORRECT ANSWER -a shared pair of electrons
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Correct Answers 2026–2027 | Complete Revision Guide &
Exam Practice Pack
Types of electrolysis - CORRECT ANSWER -Of aqueous ionic compounds
Of molten ionic compounds
Ionic compound - CORRECT ANSWER -
a compound composed of positive(cations) and negative ions(anions)
Why can't ionic compounds conduct electricity as solid? - CORRECT ANSWER -
The electrons aren't free to move and carry the charge through the structure
What is an electrolyte? - CORRECT ANSWER -a liquid/solution that conducts electricity
Define discharge - CORRECT ANSWER -Gain/loss of electrons to become electrically neutral/ an atom
What is the general rule for electrolysis of aqueous solutions regarding which ion gets discharged at eac
h electrode ? - CORRECT ANSWER -The ion that is easiest to discharge will be discharged
How are electrolytes made? - CORRECT ANSWER -by melting or dissolving ionic compounds
What is the a positive electrode called? - CORRECT ANSWER -Anode
What is a negative electrode called? - CORRECT ANSWER -Cathode
reduction - CORRECT ANSWER -gain of electrons
Oxidation - CORRECT ANSWER -loss of electrons
1
, Which electrode are cations discharged at ? - CORRECT ANSWER -Cathode
Does oxidation or reduction occur at the cathode? - CORRECT ANSWER -reduction
Cations are discharged at the cathode as they gain electrons to become atoms
Which electrode are anions discharged at? - CORRECT ANSWER -Anode
Does oxidation or reduction occur at the anode? - CORRECT ANSWER -oxidation
Anions are discharged at the anode as they lose electrons to become atoms
How do ions become atoms or molecules? - CORRECT ANSWER -By losing or gaining electrons
How does an electrolysis circuit become complete? - CORRECT ANSWER -
A flow of electrons taken from anode to cathode
How do you measure the conductivity of an electrolyte? - CORRECT ANSWER -With a conductivity probe
In molten ionic compounds there is only - CORRECT ANSWER -one source of ions
In the electrolysis of molten lead bromide what is the half equation for the Pb2+ ions? -
CORRECT ANSWER -Pb2 + 2e --> Pb
In the electrolysis of molten lead bromide what is the half equation for the Br- ions? -
CORRECT ANSWER -2Br- -->Br2 + 2e
What is an electric current? - CORRECT ANSWER -the flow of electrons
What is a covalent bond? - CORRECT ANSWER -a shared pair of electrons
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