WorksheetsCracking and Hydrocarbons mid-topic review
Total questions: 10
Worksheet time: 5mins
What is a SATURATED hydrocarbon?
a compound that only has double bonds between carbon atoms
a compound that has no double bonds between carbon atoms
a compound that does not contain any carbon atoms
a compound that only has one double bond between carbon atoms
What is the general formula for the ALKANES?
CnH2n
CnHn
C2nHn
CnH2n+2
What happens in the process of CRACKING?
long chain hydrocarbons are joined together to make even longer ones
short chain hydrocarbons are joined together to make longer ones
long chain hydrocarbons are broken into shorter ones
long chain hydrocarbons are separated into fractions
What TYPE of reaction is cracking an example of?
oxidation
reduction
thermal decomposition
trick question - it s a physical change!
What is the general formula for ALKENES?
CnH2n
CnHn
C2nHn
CnH2n+2
Why is CRACKING useful?
It produces short chain alkanes and alkenes, which are more useful than long alkanes
It produces longer alkanes which are the most useful hydrocarbons
It uses up the alkenes for which there is only a low demand
There is a greater demand for long chain alkanes than can be met by crude oil only
What can be used to distinguish (tell the difference between) ALKANES and ALKENES?
a flame
limewater
bromine water
distilled water
What colour does bromine water turn in the presence of an ALKENE?
it stays orange-red
bright orange
bright yellow
it becomes colourless
Which of the following is an ALKENE?
CH4
C6H6
C3H6
C3H8
What is the correct name of the molecule with the formula C2H6?
Ethane
Ethene
Propane
Propene
