1a4 marks
a)
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i)
Organic compounds can exist as isomers.
Explain what is meant by the term isomers.
(2)
ii)
Organic compound Q reacts with bromine, without the presence of ultraviolet radiation, to form the compound C4H8Br2.
Draw the displayed formulae of two isomers of Q.
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a a a a a a |
(2)
1b5 marks
b)
An acrylic polymer can be formed from molecules with this structure.
i)
A student describes the molecule as an unsaturated hydrocarbon.
Explain whether this is a correct description.
(2)
ii)
Name the type of polymerisation that occurs in the formation of the polymer.
(1)
iii)
Complete the equation for the polymerisation reaction.
(2)
1c
6 marks
6 marksc)
Octane is a compound in petrol.
The equation for the complete combustion of octane is
C8H18 + 12.5O2 → 8CO2 + 9H2O
i)
The fuel tank of a car contains 50.0 dm3 of octane.
Calculate the mass, in kg, of carbon dioxide formed if all the octane in the fuel
tank undergoes complete combustion.
[mass of 1 dm3 of octane = 700 g]
mass = ................................................kg
(5)
ii)
State an environmental problem caused by carbon dioxide.
(1)
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