Fractional distillation of crude oil

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

• distillation

• fractional distillation

• cracking

• polymerisation

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

• melting point

• boiling point

• freezing point

• chemical reactivity

Molecules collected at the bottom of the fractionating column tend to be...

• more viscous, less flammable and less volatile

• less viscous, more flammable and more volatile

• more viscous, more flammable and less volatile

• less viscous, less flammable and more volatile

Molecules collected at the top of the fractionating column tend to be...

• more viscous, less flammable and less volatile

• less viscous, more flammable and more volatile

• more viscous, more flammable and less volatile

• less viscous, less flammable and more volatile

Name the following hydrocarbon

• butane

• hexane

• heptane

• hexene

When testing for alkenes (unsaturation) bromine water turns from...

• orange --> blue/black

• colourless --> pink

• orange --> colourless

• orange --> clear

Which key term is described as the attractive force BETWEEN molecules?

• a) Inner molecular forces
• b) Outer molecular forces
• c) Intermolecular forces
• d) Intramolecular forces

Which of the following is not a use of the products from the fractional distillation of crude oil?

• a) Iron ore
• b) Petrol
• c) Asphalt
• d) Motor fuel

A fraction of crude oil is made up of:

• Hydrocarbons of similar chain lengths

• Numbers

• Large hydrocarbons

• Alkenes only

Crude oil is made up of:

• Ethane

• Butane

• A mixture of different hydrocarbons

• Extremely large hydrocarbons which are broken up once extracted