Chem Review

What is fractional distillation?

• a process used to separate crude oil

• a process used to burn up fuels

• a way to make different products

• how oil is extracted from the ground

Which of these substances is not a hydrocarbon?

• methane

• ethane

• propane

• butane

• ammonia

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

• melting point

• boiling point

• freezing point

• chemical reactivity

Crude oil is made up of:

• Ethane

• Butane

• A mixture of different hydrocarbons

• Extremely large hydrocarbons which are broken up once extracted

What process happens at each level in the fractionating column?

• Evaporation

• Condensation

• Combustion

Tags

NGSS.HS-PS3-4

Where do short chain hydrocarbons collect?

• At the top

• In the middle

• At the bottom

Where do long chain hydrocarbons collect?

• At the top

• In the middle

• At the bottom

Shorter hydrocarbons have:

• Higher boiling points

• Lower boiling points

The process in which nitrogen circulates and is recycled is called

• The nitrogen cycle

• The carbon cycle

• The water cycle

• The phosphorus cycle

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things