HW Unit 2.1 Oil Strike
Part A
1.
5.
The name of the above compound is
A.
B.
C.
D.
2,3-dimethylpentane
3,4-dimethylpentane
2,3-dimethylpropane
3,4-dimethylpropane
Which of the following compounds is
an isomer of the one shown above?
A.
2. Which of the following could be the
molecular formula of a cycloalkane?
A.
B.
C.
D.
C7H16
C7H14
C7H12
C7H10
3. Which of the following compounds
fits the general formula CnH2n and will
rapidly decolourise bromine solution?
A.
B.
C.
D.
Cyclopentane
Cyclopentene
Pentane
Pentene
B.
C.
4. Which of the following hydrocarbons
does not belong to the same
homologous series as the others?
A.
B.
C.
D.
CH4
C3H8
C4H10
C6H12
D.
6. What is the name of the following
molecule?
A.
B.
C.
D.
9. Crude oil undergoes fractional
distillation to produce a number of
fractions
But-2-ene
Pent-2-ene
But-3-ene
Pent-3-ene
7. The below structural formulae
represent
Compared with the gasoline fraction,
the heavy gas oil fraction is
A. Less viscous and evaporates
more readily
B. More viscous and evaporates
more readily
C. Less viscous and evaporates
less readily
D. More viscous and evaporates
less readily
A.
B.
C.
D.
the same hydrocarbon
different hydrocarbons
isomers
isotopes
10. An unsaturated alkene can react
with bromine solution.
C3H6 +
8. 1 mole of a hydrocarbon burns
completely in oxygen to produce 2
moles of carbon dioxide and 2 moles
of water. The formula is
A.
B.
C.
D.
C2H4
C2H6
C4H8
C4H10
Br2 
C3H6Br2
This type of reaction is known as
A.
B.
C.
D.
Cracking
Addition
Condensation
Neutralisation
Part B
1. Methylpropene and an alkane can be used to produce 2,2,4-trimethylpentane, a
molecule added to petrol.
a) (i) Give the systematic name for the alkane used in the above reaction (1 mark)
(ii) Name the type of chemical reaction shown above.
(1 mark)
b) A similar reaction can be used to prepare 2,2-dimethylpentane. Draw a structural
formula for the alkene used to form this molecule.
(1 mark)
2. The diagram shows how paraffin, C12H26 , can be cracked.
a) Name the catalyst used in cracking.
(1 mark)
b) One of the reactions taking place when paraffin is cracked is
(i) Identify molecule X.
(ii) Describe what would be seen when X is added to bromine solution.
(2 marks)
3. A student calculated the energy absorbed by water when ethanol is burned and
obtained the following results
Mass of ethanol burned (g)
0.5
Mass of water heated (g)
100
Initial temperature of water (°C)
24
Final temperature of water (°C)
58
Calculate the energy, in kJ, absorbed by the water. You may wish to use work data
book to help you. Show your working clearly.
(3 marks)
4. Draw the shortened structural formula for propene.
(1 mark)