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Fuel Cells (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Fuel Cells' from the broader topic Energy Changes. The test is geared towards the AQA exam board style syllabus.
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Why is water management important in PEM fuel cells?
At the anode of a proton exchange membrane (PEM) fuel cell, which half-reaction occurs?
Why does a fuel cell produce a continuous electrical current while fuel is supplied?
One advantage of a hydrogen fuel cell over a combustion engine is:
What is a potential environmental benefit of using fuel cells for distributed power generation near homes?
Which of the following is an advantage of using a fuel cell for stationary power generation compared to combustion-based generators?
Why might a fuel cell vehicle produce more environmental benefit if its hydrogen is made using renewable electricity rather than from natural gas?
Why is platinum used as a catalyst despite its high cost?
Which fuel cell type is most commonly used in vehicles and small-scale applications due to its low operating temperature and fast start-up?
Which of the following is the overall chemical reaction in a typical hydrogen fuel cell?
How can carbon monoxide (CO) in hydrogen fuel be reduced to avoid poisoning fuel cell catalysts?