Hydrocarbon Reactions

Hydrocarbon Reactions

Multiple Choice

A petrochemical molecule undergoes the chemical change shown. What is the chemical change?

• cracking

• polymerisation

• fractional distillation

• reduction

Multiple Choice

Which of the following chemical reactions involve combustion?

• A forest fire

• Human digestion

• A car using petrol

• All of the above

Multiple Choice

What is essential for a combustion reaction to begin?

• Carbon dioxide
• Fuel 
• Fuel, oxygen and heat
• Water and oxygen

Multiple Choice

What are the products of combustion?

• Hydrogen + oxygen

• Carbon dioxide + water

• Carbon dioxide + hydrogen

• Carbon + water

Multiple Choice

What TYPE of reaction is cracking an example of?

• oxidation

• reduction

• thermal decomposition

• trick question - it s a physical change!

Multiple Choice

C₁₀H₂₂ --> C₅H₁₂ + C₃H₆ + ?

• C₂H₄

• C₃H₄

• C₂H₆

• CH₄

Multiple Select

What conditions are needed for cracking?

• high temperature

• high pressure

• catalyst

• low temperature

Multiple Choice

Why is CRACKING useful?

• It produces short chain alkanes and alkenes, which are more useful than long alkanes

• It produces longer alkanes which are the most useful hydrocarbons

• It uses up the alkenes for which there is only a low demand

• There is a greater demand for long chain alkanes than can be met by crude oil only

Multiple Choice

A stick of butter is what type of fat?

• Saturated Fat

• Polyunsaturated Fat

• Monounsaturated Fat

Multiple Choice

Which fat is solid at room temps?

• Saturated

• Unsaturated

Multiple Choice

What type of a bond keeps polymer chains together?

• James Bond

• Polar bond

• Ionic bond

• Covalent bond

Multiple Choice

What is Polyethene made from?

• Ethene

• Ethane

• Propane

• Propene

Multiple Select

Which one of these is the right answer?

• This one

• Obviously this one

• I'm confused

• Definitely not this one