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13 questions
What type of reaction takes place in a chemical cell
Exothermic
Endothermic
No reaction occurs
What is produced by a hydrogen-oxygen fuel cell?
Water and Carbon Dioxide
Carbon Dioxide
Water
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
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
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
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
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
In a hydrogen fuel cell used to power a car, where does the oxygen come from?
The air
A catalyst
The fuel
Does a fuel cell need to be recharged?
Yes
No
Fuel cell doesn't create
pollution
greenhouse gases
water
noise
The only waste is
air
water
gas
gasoline
Which are the 2 main fuel cells problems?
Each cell is heavy and bulky
How to generate and deliver hydrogen fuel
Where to throw away the waste
The greenhouse gas carbone dioxide
Which is the ultimate goal?
To invest more money in research
To invent a new battery
To put it on race cars
To extract hydrogen from plants and water
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