GCSE Chemistry 2026 | Comprehensive
Study Guide, Practice Questions,
Answers, Required Practicals & Exam
Review | Complete Ethics
Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,Exothermic Is this exothermic or endothermic?
Endothermic Is this exothermic or endothermic?
Take in Does breaking bonds take in or release energy?
Release Does making bonds take in or release energy?
Combustion, oxidation, neutralisation Give three examples of exothermic reactions
Thermal decomposition Give an example of an endothermic reaction
bond energy of reactants - bond energy of products How do you work out enthalpy change?
Exothermic Does a negative enthalpy change mean the reaction is exothermic or endothermic?
A system which generates electricity using chemical What is an electrochemical cell?
reactions
The negative terminal Which terminal does electricity flow from?
The more reactive metal Which metal does electricity flow from in a cell?
There is a negative voltage What happens if electrode A is more reactive than electrode B
The negative electrode In an electrochemical cell which is the cathode?
, The positive electrode In a hydrogen fuel cell which is the cathode?
The negative electrode In electrolysis which is the cathode?
Multiple cells connected in series What is a battery?
If the reaction is reversible When is a battery rechargeable?
Redox What type of reaction occurs in a hydrogen fuel cell?
Phosphoric acid and potassium hydroxide Give two examples of electrolytes in a hydrogen fuel cell
2CuO(s) + C(s) → 2Cu(l) + CO2(g) What is the equation for the smelting of copper oxide (with state symbols)?
Oxygen In a hydrogen fuel cell, what is put in the cathode compartment?
It loses electrons and is oxidised In an acid hydrogen fuel cell, what happens to hydrogen at the anode?
H2 -> 2H(+) + 2e(-) What is the formula for the oxidation of hydrogen?
They move to the cathode What happens to the H+ ions in an acid fuel cell?
It gains electrons and is reduced and then reacts with the In an acid fuel cell, what happens to the oxygen at the cathode?
hydrogen (O2 + 4H(+) -> 2H2O)
2H2 + O2 -> 2H2O What is the overall reaction in a fuel cell?
02 + 2H20 + 4e(-) -> 4OH(-) What is the half equation at the cathode (positive electrode) in an alkaline fuel cell?
2H2 + 4OH(-) -> 2H2O + 4e(-) What is the half equation at the anode (negative electrode) in an alkaline fuel cell?
Study Guide, Practice Questions,
Answers, Required Practicals & Exam
Review | Complete Ethics
Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,Exothermic Is this exothermic or endothermic?
Endothermic Is this exothermic or endothermic?
Take in Does breaking bonds take in or release energy?
Release Does making bonds take in or release energy?
Combustion, oxidation, neutralisation Give three examples of exothermic reactions
Thermal decomposition Give an example of an endothermic reaction
bond energy of reactants - bond energy of products How do you work out enthalpy change?
Exothermic Does a negative enthalpy change mean the reaction is exothermic or endothermic?
A system which generates electricity using chemical What is an electrochemical cell?
reactions
The negative terminal Which terminal does electricity flow from?
The more reactive metal Which metal does electricity flow from in a cell?
There is a negative voltage What happens if electrode A is more reactive than electrode B
The negative electrode In an electrochemical cell which is the cathode?
, The positive electrode In a hydrogen fuel cell which is the cathode?
The negative electrode In electrolysis which is the cathode?
Multiple cells connected in series What is a battery?
If the reaction is reversible When is a battery rechargeable?
Redox What type of reaction occurs in a hydrogen fuel cell?
Phosphoric acid and potassium hydroxide Give two examples of electrolytes in a hydrogen fuel cell
2CuO(s) + C(s) → 2Cu(l) + CO2(g) What is the equation for the smelting of copper oxide (with state symbols)?
Oxygen In a hydrogen fuel cell, what is put in the cathode compartment?
It loses electrons and is oxidised In an acid hydrogen fuel cell, what happens to hydrogen at the anode?
H2 -> 2H(+) + 2e(-) What is the formula for the oxidation of hydrogen?
They move to the cathode What happens to the H+ ions in an acid fuel cell?
It gains electrons and is reduced and then reacts with the In an acid fuel cell, what happens to the oxygen at the cathode?
hydrogen (O2 + 4H(+) -> 2H2O)
2H2 + O2 -> 2H2O What is the overall reaction in a fuel cell?
02 + 2H20 + 4e(-) -> 4OH(-) What is the half equation at the cathode (positive electrode) in an alkaline fuel cell?
2H2 + 4OH(-) -> 2H2O + 4e(-) What is the half equation at the anode (negative electrode) in an alkaline fuel cell?
