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- 1. Multiple Choice
What type of reaction takes place in a chemical cell
Exothermic
Endothermic
No reaction occurs
- 2. Multiple Choice
Why does the voltage from a chemical cell that is connected in a circuit with a lamp eventually reach zero?
The lamp breaks
One of the reactants is used up
The circuit becomes broken
- 3. Multiple Choice
What is produced by a hydrogen-oxygen fuel cell?
Water and Carbon Dioxide
Carbon Dioxide
Water
- 4. Multiple Choice
What happens to hydrogen molecules in a hydrogen-oxygen fuel cell?
They form hydrogen ions, H+ , and electrons, e-
They form hydrogen ions, H+ , and electrons, e+
They form hydrogen atoms, H
- 5. Multiple Choice
What happens to oxygen molecules in a hydrogen-oxygen fuel cell?
They react with electrons to form oxide ions, O2-
They react with hydrogen ions to form hydroxide ions, OH-
They react with hydrogen ions and electrons to form water
- 6. Multiple Choice
Which of these is a disadvantage of cars driven by hydrogen-oxygen fuel cells rather than by petrol engines?
They have fewer moving parts
There are fewer suitable filling stations
They emit little pollution
- 7. Multiple Choice
What is the main reason why hydrogen is more difficult to store than diesel?
Hydrogen is a gas at room temperature but diesel is a liquid
Hydrogen can be liquefied by cooling it
Hydrogen can be stored under pressure
- 8. Multiple Choice
What is a strength of using hydrogen-oxygen fuel cells in manned spacecraft, compared to using chemical cells?
They produce electricity
They produce water that the astronauts can drink
They produce a voltage
- 9. Multiple Choice
What is a disadvantage of using solar photovoltaic cells to provide electricity in a spacecraft?
Photovoltaic cells have lots of moving parts
Photovoltaic cells release toxic byproducts
Photovoltaic cells only work when the spacecraft is in direct sunlight
- 10. Multiple Choice
In a hydrogen fuel cell used to power a car, where does the oxygen come from?
The air
A catalyst
The fuel
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