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WorksheetsAlkenes
Total questions: 28
Worksheet time: 16mins
What is the general formula for an alkene?
CnHn
CnH2n
CnH2n+2
CnH2n+1
The functional group of an alkene is responsible for its reactivity.
True
False
Alkenes are more reactive than alkanes.
True
False
Alkenes are saturated hydrocarbons.
True
False
What happens when an alkene reacts with bromine water?
Simply no reaction occurs
The bromine turns a darker brown
The bromine water decolourises
The reaction causes an explosion
Can someone tell the difference between an alkene and alkane by reaction with bromine water?
Yes
No
What is hydration?
Addition of water
Addition of nitrogen
Addition of steam
Addition of hydrogen
What is the catalyst used for the hydration of an alkene?
Conc. sulfuric acid
Conc. hydrochloric acid
Conc. phosphoric acid
Conc. ethanoic acid
Which of the following is an alkene?
Decene
Nonene
Decane
Tricyclane
What does the hydration of an alkene produce?
A carboxylic acid
An alcohol
Remains an alkene
An alkane
What temperature and pressure are used in the hydration of alkenes?
300°C , 80 atm
400°C, 25 atm
300°C, 65 atm
200°C, 30 atm
What is the catalyst used in the hydrogenation process?
Iron
Copper
Steel
Nickel
What are the pressure and temperature used in the hydrogenation of an alkene?
400°C, 60atm
500°C, 80atm
350°C, 80atm
350°C, 60atm
What does the hydrogenation of an alkene produce?
An alkane
An alcohol
An ester
Remains an alkene
What happens when an alkane is mixed with aqueous bromine?
No reaction takes place
Turns dark blue
Becomes decolourised
Turn yellowish-green
The first member of the alkenes is ethene
Yes
No
What is/are the use(s) of polyethene?
Plastic bags
Tyres
Wire insulation
Pipes
What are the properties of polyethene
good conductor of electricity
good conductor of heat
cheap
lustrous
What is/are the disadvantage(s) of polyethene?
Non-biodegradable
Melts easily
Flammable
Weak
What is the polymer made from the monomer, chloroethene?
Polymethane
Polyethene
Polychloroethene
Polynomial
What is the monomer of polypropene?
Ethene
Propene
Hexene
Decene
Which of the following is a feature of monomers that undergo addition polymerisation?
They are saturated
They contain a C=C functional group
They contain OH and COOH functional groups
They have single carbon bonds
What are some polymers used in everday life?
Sportswear
Ropes
Buckets
Styrofoam
What are some ways to deal with polymer waste?
Incineration
Recycling
Landfills
Decomposition
How can an alkene be produced from an alkane
Via cracking
Via boiling
Via dehydration
Via flash-freezing
What is the reactant in cracking?
Alkane
Alkene
Carboxylic acid
Alcohol
What is the catalyst used in catalytic cracking?
Vanadium (V) oxide
Iron
Sulfuric acid
Aluminium oxide
What is the process to turn an alcohol to an alkene?
Dehydration
Fermentation
Brewing
Fractional distillation
