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Total questions: 35
Worksheet time: 28mins
the name of this compaund C4H10
METHANE
HEXENE
BUTANOIC ACID
BUTANE
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
Crude oil is made up of:
Ethane
Butane
A mixture of different hydrocarbons
Extremely large hydrocarbons which are broken up once extracted
Kerosene (paraffin) is used for:
Fuel for cars
Domestic heating and cooking
Fuel in aircraft
Fuel for large ships and in power stations
What is the name of the alkane with two carbon atoms?
Ethane
Methane
Butane
Propane
What is the definition of a hydrocarbon?
A compound made of hydrogen and carbon only
A compound that includes hydrogen or carbon
A mixture that includes hydrogen and carbon
A mixture of hydrogen and carbon only
What is the first stage in the fractional distillation of crude oil?
Heating, to vaporise the hydrocarbons
Heating, to make it a hot liquid
Cooling it
Separating the fractions
The alkanes are a homologous series.
What is the general formula of the alkanes?
n carbon atoms, 2n hydrogen atoms
2n carbon atoms, n hydrogen atoms
n carbon atoms, n+2 hydrogen atoms
n carbon atoms, 2n+2 hydrogen atoms
Hydrocarbons with shorter carbon chains are more flammable.
What does this make them useful for?
Lubricants
Fuels
Plastics
Feedstock
Put the two processes used in fractional distillation in the correct order.
Evaporating and then melting
Evaporating and then condensing
Condensing and then evaporating
Melting and then condensing
C3H8
Complete the Alkane formula:
C6H (a)
Match the following
C7H__
16
C3H8
Propane
C8H__
18
C_H20
9
C_H10
4
Where are the largest hydrocarbons collected?
Where are the smallest hydrocarbons collected?
Reorder the following
Crude oil is vaporised
Before entering the column
The column is hottest at the bottom
Larger molecules condense lower down
Small hydrocarbons have a very low boiling point
Collected at the top of the column
The length of the hydrocarbon affects its boiling point
Boiling points separate hydrocarbons
Match the statements
Hydrocarbon series with no double bonds
Alkanes
Hydrocarbon series with double bonds
Alkenes
A method of separating hydrocarbons
Fractional Distillation
A method of splitting larger hydrocarbons into smaller ones
Cracking
Turns from orange to clear with alkenes
Bromine Water
Cracking splits (a) hydrocarbons into (b) hydrocarbons. This can be done using a (c) or steam . There will only be one (d) produced and one or more (e)
