Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
Fuel cells convert the chemical energy in a fuel and oxygen into:
Sound
Electricity
Infrared radiation
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Which direction do the electrons flow in a hydrogen-oxygen fuel cell?
From the cathode to the anode
From the anode to the cathode
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What is the overall reaction for a hydrogen oxygen fuel cell?
hydrogen + oxygen ➔ water + carbon dioxide
hydrogen + oxygen ➔ water
water ➔ hydrogen + oxygen
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What is an electrolyte?
A solution through which ions can flow
Electrically charged water
A solution of electrons
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positive / negative
In fuel cells the anode (which is drawn on the left) is , while the cathode (drawn on the right) is .
This is the opposite way around to the anode and cathode in electrolysis, so be careful not to mix them up.
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What are the electrodes in fuel cells made from?
Porous carbon
Reaction metal
Inert plastic
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The oxygen enters the cathode compartment and the hydrogen enters the anode compartment.
False
True
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When hydrogen gas enters a fuel cell, it loses electrons to become hydrogen ions. Is the hydrogen gas oxidised or reduced?
Oxidised
Reduced
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What are the main advantages of hydrogen-oxygen fuel cells?
(Select all that apply)
Hydrogen and oxygen are both renewable
Fuel cells last longer than batteries
It requires energy to produce the hydrogen
The reaction doesn't produce any pollutants
The hydrogen fuel exists as a gas at room temperature
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What are the main disadvantages of hydrogen-oxygen fuel cells?
(Select all that apply)
Hydrogen and oxygen are both renewable
Fuel cells are simpler then combustion engines
Hydrogen gas requires a large space to store
Hydrogen is highly flammable, so danger to store
It requires energy to produce hydrogen
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