WorksheetsPure Chem - Alkanes & Alkenes
Total questions: 35
Worksheet time: 22mins
Going in order from the top of the column, the fractions are:
Gases, diesel, bitumen, fuel oil, petrol, kerosene
Gases, petrol, fuel oil, diesel, kerosene, bitumen
Gases, gasoline, kerosene, diesel, fuel oil, bitumen
Gases, kerosene, diesel, petrol, bitumen, fuel oil
What is meant by a homologous series?
A family of compounds with similar chemical properties and the same general formula
The method for separating the different length alkanes
The process for turning alkanes into alkenes
Where two compounds have the same displayed formula
Each member of a homologous series differs from the next by a
–CH2 group
–CH group
–CO2 group
–CH4 group
Each member of a homologous series differs from the next by molecular mass of
12
14
16
44
Alkanes molecules are held together by
weak Van der Walls forces of attraction
weak Van der Waals forces of attraction
strong covalent bonds
strong intermolecualr forces
C3H8
Which is the structures with IUPAC nomenclature
2,2,4-trimethylpentane
Give the IUPAC name for this compound
3-methyl-4-ethylhexane
3-ethyl-4-methylhexane
3-methyl-4-ethylheptane
3-ethyl-4-methylheptane
What are the products formed when organic compounds burn completely ?
carbon and oxygen
carbon dioxide and water
carbon, carbon monoxide and water
carbon, carbon dioxide and water
Possible products of INCOMPLETE combustion
Carbon (C)
Carbon Monoxide (CO)
Carbon Dioxide (CO2)
Water (H2O)
Alkanes undergo substitution by chlorine only in the presence of
UV light
oxygen
water
aqueous bromine
Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.
isomers
isotopes
polymers
alkanes
Given the formula representing a compound:
Which formula represents an isomer of this compound?
Which formulas represent compounds that are isomers of each other?
Which of the following is unsaturated hydrocarbon ?
propane
propene
propanol
propanoic acid
Which of the following shows the structure of ethene?
Name this compound
propene
2-methylprop-1-ene
2-methylpropene
2, methylpropene
Which of the following is not a chemical properties of alkenes?
combustion
substitution
addition reaction
polymerisation
Which reagent is needed to change CH3CH=CH2 to CH3CHClCH3
Cl2 (aq)
SOCl2
PCl3
HCl
What is the condition for hydration of butene ?
phosphoric acid, 60 atm, 300 0C
Nickel or platinum, 180 oC
1000atm, 200 oC
room temperature
But-1-ene reacts with steam in the presence of a concentrated acid catalyst. What is the major product formed?
Butan-1-ol
Butan-2-ol
Butanone
Butanal
Which of the following is the monomer for this polymer ?
ethene
ethane
propane
propene
Which diagram shows the correct structure for a repeating unit of polypropene?
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
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.
Why is cracking done?
Because longer alkanes are more useful than shorter alkanes
Because shorter alkanes are more useful than longer alkanes
Crude oil must be separated as the mixture of molecules is no use
Because the alkenes produced are useful to make plastics with
What are the conditions for cracking?
solid catalyst of aluminium oxide and silicon dioxide, at 600oC
nickel catalyst at 200oC
nickel catalyst at 600oC
solid catalyst of aluminium oxide and silicon dioxide, at 200oC
Complete the equation C16H34 ---> __________ + C2H4
C16H34
C2H30
C10H20
C14H30
