WorksheetsAlkanes vs Alkenes
Total questions: 25
Worksheet time: 25mins
Which of the following can be used to distinguish between alkanes and alkenes?
add a few drops of aqueous bromine
add a few drops of Universal indicator
add a piece of blue litmus paper
add a piece of red litmus paper
A homologous series is a family of organic compounds with
similar chemical properties and same general formula
similar chemical properties and different general formula
different chemical properties and same general formula
similar physical properties and same general formula
Which of the following statement is correct?
Alkenes can turn aqueous bromine from reddish-brown to colourless.
Alkenes can turn aqueous bromine from colourless to reddish-brown.
Alkanes can turn aqueous bromine from reddish-brown to colourless.
Alkanes can turn aqueous bromine from colourless to reddish-brown.
State the general formula for alkene
CnH2n+2
CnH2n
CnH2n+1
CnH2n-2
What is the process called when a large alkane is broken down into smaller alkanes and alkenes?
Polymerization
Hydrogenation
Cracking
Halogenation
Which reaction involves the addition of hydrogen to an alkene to form an alkane?
Hydration
Hydrogenation
Halogenation
Polymerization
What is the name of the process that converts unsaturated hydrocarbons to saturated hydrocarbons using a catalyst?
Catalytic cracking
Catalytic reforming
Catalytic hydrogenation
Catalytic hydration
The formula for ethene is
C2H4
C2H6
CH4
C3H6
Both alkanes and alkenes are
hydrocarbons
alcohols
saturated
unsaturated
An alkane is
polyunsaturated
polysaturated
saturated
unsaturated
Which of the following statements about cracking is not true?
Cracking is the breakdown of large alkane molecules into small molecules.
Cracking is used to produce fuel for motor vehicles.
Cracking is used to produce H2 and alkenes.
Cracking takes place in the presence of sunlight.
Which of the following shows the structure of ethene?
Is the name of single bonded, saturated hydrocarbons.
Alkanes
Alkenes
Alkynes
Tanins
Is the name of doubled bonded, unsaturated hydrocarbons.
Alkanes
Alkenes
Allkynes
Tanins
Which of the following is a characteristic of alkanes?
Saturated hydrocarbons
Unsaturated hydrocarbons
Contain double bonds
Contain triple bonds
What is the general formula for alkanes?
CnH2n+2
CnH2n
CnH2n−2
CnH2n+1
Which of the following reactions can be used to test for the presence of alkenes?
Bromine water test
Limewater test
Litmus test
Benedict's test
What type of bond is present in alkenes that is not present in alkanes?
Double bond
Single bond
Triple bond
Ionic bond
Which of the following is a property of alkenes?
They are more reactive than alkanes
They are less reactive than alkanes
They are saturated hydrocarbons
They are aromatic hydrocarbons
What is the process called when alkenes are converted to alkanes?
Hydrogenation
Dehydration
Oxidation
Polymerization
Which of the following is a real-world application of alkenes?
Used in the production of plastics
Used as a primary fuel source
Used in the production of glass
Used in the production of metals
What is the main difference in the combustion of alkanes and alkenes?
Alkenes produce more soot
Alkanes produce more soot
Alkenes burn with a cleaner flame
Alkanes burn with a cleaner flame
Which of the following is true about the boiling points of alkanes and alkenes?
Alkanes generally have higher boiling points than alkenes
Alkenes generally have higher boiling points than alkanes
Both have the same boiling points
Boiling points depend only on molecular weight
What is the result of adding bromine water to an alkene?
The solution becomes colorless
The solution remains brown
The solution turns blue
The solution turns red
Which of the following is a structural isomer of butene?
2-methylpropene
Butane
Propene
Ethene
