C7.4 Cracking Crude Oil

What is cracking?

• A process that turns long chain hydrocarbons into short chain hydrocarbons

• A process that turns short chain hydrocarbons into long chain hydrocarbons

Why do we use cracking to get petrol?

• The supply of petrol from cracking is larger than the demand

• The supply of petrol from fractional distillation is larger than the demand

• The supply of petrol from fractional distillation is smaller than the demand

• The supply of petrol from cracking is smaller than the demand

Tags

NGSS.HS-ESS3-1

NGSS.HS-ESS3-2

Which is NOT a property of a long chain hydrocarbon?

• Viscous

• Flammable

• Not very volatile

• High boiling point

In the following fractions, which contains the longest hydrocarbons?

• LPG

• Petrol

• Kerosene

• Heavy fuel oil

What is always produce during cracking?

• Alkane + alkane

• Alkane + alkene

• Alkene + alkene

Decane (10 carbons) is cracked into hexane (6 carbons) and an alkene. What is the name of this alkene?

• Ethene

• Propene

• Butene

• Pentene

Octane (8 carbons) is cracked into hexane (6 carbons) and an alkene. What is the name of this alkene?

• Ethene

• Propene

• Butene

• Pentene

What type of reaction is cracking?

• Addition

• Displacement

• Thermal decomposition

• Neutralisation

Which type of cracking requires very high temperatures?

• Steam

• Catalytic

Tags

NGSS.HS-PS1-5

Which type of cracking requires very high pressure?

• Steam

• Catalytic