WorksheetsHydrocarbons
Total questions: 25
Worksheet time: 13mins
Which of the following would have the highest boiling point?
C3H8
C4H8
C5H12
C22H44
What is the general formula of the alkenes?
CnH2n+1
CnH2n+2
CnH2n
CnH2n+1OH
In complete combustion, the products are?
Carbon monoxide and water
Carbon dioxide and water
Carbon dioxide and carbon
Carbon and water
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
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
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
