Chemical Cells & Fuel Cells Quiz
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5 questions, one answer each
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1. When does a simple chemical cell stop producing a voltage?
- A. After exactly one hour
- B. When one of the reactants is used up
- C. When it is exposed to air
- D. Chemical cells never stop producing a voltage
2. What is the only product of a hydrogen-oxygen fuel cell?
- A. Carbon dioxide
- B. Water
- C. Hydrogen peroxide
- D. Oxygen
3. Which of these is a genuine weakness of hydrogen fuel cells compared with petrol engines?
- A. They produce more carbon dioxide than petrol engines
- B. Hydrogen is difficult and costly to store and transport safely
- C. They cannot produce electricity
- D. They require combustion of hydrogen in a flame
4. A city wants zero-emission buses and is comparing hydrogen fuel cell buses with battery-electric buses. Which statement is a fair evaluation point in favour of fuel cells?
- A. Fuel cell buses can be refuelled quickly and run continuously as long as hydrogen is supplied, unlike a battery which must be recharged and eventually goes flat
- B. Fuel cell buses produce carbon dioxide, which is cleaner than batteries
- C. Hydrogen is easier to store than electricity in all circumstances
- D. Fuel cells require no supply of fuel to keep working
5. Why can it be misleading to describe hydrogen fuel cell vehicles as producing 'zero pollution overall'?
- A. Because fuel cells produce carbon monoxide directly
- B. Because the hydrogen used may have been produced using energy from fossil fuels
- C. Because fuel cells release nitrogen oxides
- D. Because water vapour itself is a pollutant