return to Science: Single Award B (1535) first exam 2003
Candidates will be assessed throughout this module on their ability to:
* recall the formulae of elements and simple compounds in the module
* represent chemical reactions by word equations; write simple balanced
equations and use the state symbols
(s), (l), (g) and (aq)
* write balanced equations to
describe and explain a wide range of reactions including ionic
equations
You should be able to:
(4.01)
explain that crude oil was formed by the long-term effects of temperature and
pressure on marine deposits
(4.02) recall that hydrocarbons contain carbon and hydrogen only
(4.03) understand that crude oil is a mixture of substances, most of which are
hydrocarbons
(4.04) understand that the mixture of substances can be separated by fractional
distillation, to yield fuels and
other useful products
(4.05) describe the fractional distillation of crude oil
(4.06) describe some uses of the various fractions
– gases
– petrol (gasoline)
– kerosene (paraffin)
– diesel oil
– fuel oil
– bitumen
(4.07) evaluate data on the properties of different fractions related to the
size of their molecule
You should be able to:
(4.08) understand that the products of
complete combustion of hydrocarbons are carbon dioxide and
water and that energy is released
(4.09) understand that oxidation is the addition of oxygen to a substance, eg
the oxidation of methane to water and
carbon dioxide
(4.10) understand that incomplete combustion can produce carbon and carbon
monoxide
(4.11) recall that carbon monoxide is a toxic gas
(4.12) recall that incomplete combustion can occur in faulty gas appliances and
other heating appliances and this can be dangerous
You should be able to:
(4.13) understand
that cracking of some oil fractions (obtained from the fractional distillation
of crude oil) yields useful hydrocarbon molecules, some of which have
carbon-carbon double bonds
(4.14) recall the conditions used in industry to crack fractions obtained from
crude oil
(4.15) describe the alkanes as saturated hydrocarbons and alkenes as unsaturated
hydrocarbons which contain a double
bond
(4.16) recall the formulae of
methane, ethane, propane and butane and draw the structures of their molecules (4.17) recall the formulae of
ethene and propene and draw the structures of their molecules
(4.18) describe how bromine water is
used to distinguish between alkenes and alkanes
(4.19) explain how
addition polymers are formed from unsaturated monomers
(4.20) describe some uses of
– poly(ethene)
– poly(propene)
– poly(styrene)
– poly(chloroethene), (polyvinyl chloride, PVC)
(4.21) understand the problems of the disposal of some plastics
You should be able to:
(4.22) describe the uses of enzymes in
washing powders and in food and drink manufacture
(4.23) recall that the dairy industry uses enzymes made by microorganisms to
produce yoghurt and cheese
You should be able to:
(4.24) know that there are several
different types of chemical reactions
(4.25) understand that neutralisation can be used to make salts, some of which
may be used as fertilisers
(4.26) understand the process of thermal decomposition, for example, as shown by
the action of heat on limestone and
copper carbonate
(4.27) describe the effect of water on calcium oxide and appreciate the solution
produced is limewater
(4.28) understand why calcium oxide and calcium hydroxide are used to neutralise
soil acidity
(4.29) recall that calcium carbonate is used
in the production of glass, cement and iron