What is fractional distillation?

• a process used to separate crude oil

• a process used to burn fuels

• a process used to make new substances

• a process used to extract oil from the ground

Which of the following substances is not a hydrocarbon?

• methane (CH₄)

• ethane (C₂H₆)

• propane (C₃H₈)

• ammonia (NH₃)

Crude oil is made up of:

• Ethane

• Butane

• A mixture of different hydrocarbons

• Extremely large hydrocarbons which are broken up once extracted

Fractional distillation separates crude oil based on the different __________ of the molecules in the mixture

• melting point

• boiling point

• freezing point

• chemical reactivity

Where do shorter chain hydrocarbon molecules collect in the fractionating tower?

• At the top

• In the middle

• At the bottom

Where do longer chain hydrocarbon molecules collect in the fractionating tower?

• At the top

• In the middle

• At the bottom

Shorter chain hydrocarbon molecules have:

• Higher boiling points

• Lower boiling points

What is the name of the following molecule?

• Methane

• Propane

• Ethane

• Butane

What do we call the groups of hydrocarbons obtained once crude oil has been separated using fractional distillation?

• percentages

• pieces

• products

• fractions

What elements are found in a hydrocarbon?

• carbon

• oxygen

• helium

• hydrogen