Paper 2: Choosing Fuels

Question 1

What fossil fuels are obtained from crude oil?

Answer 1

Petrol
Diesel oil
Fuel oil

Question 2

What fossil oil is obtained from natural gas?

Answer 2

Methane

Question 3

In what ways is hydrogen manufactured?

Answer 3

Electrolysis of water
Cracking of oil fractions
Reaction of natural gas with steam

Question 4

What are the advantages of petrol?

Answer 4

Burn easily
Don’t produce ash
Releases more energy per kilogram when it burns than fuel such as coal or wood
Liquid so easily stored and transported

Question 5

What are the disadvantages of petrol?

Answer 5

Produces carbon dioxide and carbon monoxide

Question 6

What are the advantages of hydrogen?

Answer 6

Burns easily
Does not produce ash or smoke
Only produces water
Releases nearly 3 times as much energy per kilogram as petrol

Question 7

What are the disadvantages of hydrogen?

Answer 7

Is a gas so it has to be stored at high-pressure
Filling stations would need to be adapted for hydrogen to be used in cars