Unit 4.1 Petroleum

What process is used to separate crude oil in hydrocarbons with different chain lengths?

• deposition

• fractional distillation

• cracking

• polymerization

What term is given to a compound which contains atoms of carbon and hydrogen only?

• butane

• hydrocarbon

• fraction

• saturated

Where in the fractionating column are shorter chain hydrocarbon molecules obtained?

• At the top

• At the bottom

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

• melting point

• boiling point

• freezing point

• chemical reactivity

This is pentane. How many zig zag lines would its skeleton drawing have?

• 4

• 5

• 6

• 8

Crude oil is made up of:

• Pure ethane

• only long chain hydrocarbons

• A mixture of different hydrocarbons

• Extremely large hydrocarbons which are broken up once extracted

A fraction of crude oil is made up of:

• Hydrocarbons of similar chain lengths

• Numbers

• Large hydrocarbons

• Alkenes only

Shorter hydrocarbons have:

• Higher boiling points

• Lower boiling points

Petroleum and natural gas form from...

• strong winds
• cooled magma
• radioactive materials
• remains of plants and animals 

Crude oil is also called what?

• biomass
• fossils
• coal
• petroleum