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6. what mixture of butane and propane is released at the top?
- liquified petroleum gas
- liquified propane solution
- liquified pethanol oil
- liquified palonium gasoline
7. craking is used to make alkenes for?
- breaking down hydrocarbons
- creating covalent bonds
- making poylmers
- making hydrocarbons
8. how hot is it at the bottom of a fractional distilation column?
9. cracking is used to make petrol from?
- nepatha
- naphtha
- napiltha
- napalath
10. when the intermolecular forcers are short what happens?
- they are easily overcome
- bond and create convalent bonds
- sink to the bottom of the fractional distilation column
- gradualy break down
11. in a hydrocarbon there are?
- strong covalent bonds and strong intermolecular forces
- strong covalent bonds and weak intermolecular forces
- ionic bonds and weak intermolecular forces
- ionic bonds and strong intermolecular forces
12. what are the intermolecular forces between longer hydrocarbons like?
- more compact
- stronger
- weaker
- more ionised
13. hydrocarbon molecules can be described as what?
- alkenes and halogens
- polymers and polypropanes
- alkanes and alkenes
- alkanes and naptha
14. fossil fuels are finite because?
- they are being used up faster then they can be created
- they arehard to extract
- the rates of extraction and consumtion are equal
- they are damaging for the envionment
15. what can be broken down into smaller useful alkanes and alkenes
- hydrocarbons
- alkanes
- alkanes and alkenes
- alkenes
16. how hot is it at the bottom of a fractional distilation column?
- over 400
- over 800
- 500
- 350