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WorksheetsCrude oil and hydrocarbons
Total questions: 26
Worksheet time: 12mins
What term is given to a compound which contains atoms of carbon and hydrogen only?
alkene
hydrocarbon
alkane
saturated
What term describes alkene molecules that contain a C=C double bond?
saturated
unsaturated
Alkanes have the general formula:
CnH2n
CnH2n+1
CnH2n+2
CnHn
What term describes alkane molecules that contain C-C single bonds?
saturated
unsaturated
What process is used to separate crude oil in hydrocarbons with different chain lengths?
distillation
fractional distillation
cracking
polymerisation
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
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
What are the 2 products of complete combustion?
carbon dioxide + hydrogen
carbon dioxide + water
carbon monoxide + water
carbon monoxide + hydrogen
What are the products of incomplete combustion?
carbon monoxide
water
carbon
hydrogen
What does a fuel react with when it burns?
oxygen
water
carbon dioxide
methane
What is the term given to the process by which longer chain hydrocarbons are broken down into shorter length alkanes and alkenes?
fractional distillation
evaporation
cracking
polymerisation
What conditions are needed for cracking?
high temperature
high pressure
catalyst
low temperature
Name the following hydrocarbon
alkane
pentene
pentane
alkene
C10H22 --> C5H12 + C3H6 + ?
C2H4
C3H4
CO2
CH4
When testing for alkenes (unsaturation) bromine water turns from...
orange --> blue/black
colourless --> pink
orange --> colourless
orange --> clear
Limewater turning cloudy is the test for...
carbon dioxide
water
hydrogen
oxygen
Crude oil is made up of:
Ethane
Butane
A mixture of different hydrocarbons
Extremely large hydrocarbons which are broken up once extracted
What is the structure shown?
Methane
Propane
Ethane
Butane
Where do long chain hydrocarbons collect?
At the top
In the middle
At the bottom
Where do short chain hydrocarbons collect?
At the top
In the middle
At the bottom
What does viscosity tell you about a hydrocarbon?
How easy it is to ignite
How runny it is
What is boiling point is
The shorter the hydrocarbon, the more viscous it is
True
False
