CAIE IGCSE Chemistry Hydrogen Oxygen Fuel Cell Questions

Practise writing the hydrogen–oxygen fuel-cell reaction and comparing its water-only exhaust, efficiency, storage and infrastructure with petrol engines.

Exam points

write the balanced overall equation showing hydrogen and oxygen producing water
state that chemical energy is converted to electrical energy with water as the chemical product
compare carbon emissions and efficiency with storage pressure, leakage, cost or availability

Covered syllabus points

4.2.1—Hydrogen–oxygen fuel cell uses 4.2.2—Advantages and disadvantages of using

[Maximum number: 2]

This question is about chemical reactions and electricity.

(a)

Fuel cells are used to generate electricity.

[ 2 ]

(i)

Name the reactants in a fuel cell.

[ 1 ]

(ii)

Name the waste product of a fuel cell.

[ 1 ]

[Maximum number: 1]

This question is about electricity and chemical reactions.

Hydrogen-oxygen fuel cells can be used to produce electricity to power cars. Petrol produces carbon dioxide and carbon monoxide when it powers cars.

State one disadvantage, other than cost, of using hydrogen-oxygen fuel cells to power cars compared to using petrol.

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Covered syllabus points

4.2 Hydrogen–oxygen fuel cells question 1

Question (a)

Question (i)

Question (ii)

4.2 Hydrogen–oxygen fuel cells question 2