⚡ Show all working — the AI marks against the AQA mark scheme. Method marks awarded for correct working even if the final answer is wrong.
3 marksFuel cell advantagesAQA 8462 style
Give two advantages and one disadvantage of hydrogen fuel cells compared to petrol engines for powering vehicles. (3 marks)
Hint: Two specific advantages over petrol (emissions, efficiency). One clear disadvantage (storage, production or infrastructure).
+30 XP
1 markCell voltageAQA 8462 style
Two metals are used to make an electrochemical cell. What determines the voltage produced?
A The temperature of the electrolyte
B The volume of the electrolyte solution
C The difference in reactivity between the two metals
D The colour of the metals used
3 marksRechargeable vs non-rechargeableAQA 8462 style
Give one advantage and one disadvantage of rechargeable batteries compared to non-rechargeable batteries. Explain why lithium-ion batteries are widely used in mobile phones. (3 marks)