C9 Flashcards
1
Q
What is crude oil
A
A mixture of mant different compounds
2
Q
Give the usuall examples of the compounds found in crude oil
A
Hydrocarbons(hydrogen and carbon)
3
Q
How id crude oil seperated
A
Fractional distilation
4
Q
Why do lighter fractions mkae better fuels?
A
As they ignite more easily and burn well
5
Q
How can you test the gases formed in complete combusrion of a hydrocarbon
A
- if carbon diocide is present it will turn the limewater cloudy
- if watwer is present it will turn the bluye cobalt chloride paper pink
6
Q
Give one product formed if an incomplete combustion of a hydrocarbon is made
A
Carbon monoxide
7
Q
How can large hydrocarbon molecules be broken down into smaller molecules
A
By passing the vapours over a hot catalyst
8
Q
What does cracking produce
A
Saturated hydrocarbons which is used as fuels