GCSE Chemistry Example 10 Mark Qs and Answers

For C1 paper - AQA.

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  • Created on: 14-06-11 12:57
Preview of GCSE Chemistry Example 10 Mark Qs and Answers

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Chemistry Revision
10 MARK QUESTIONS
1. This question is about rocks and metals. Iron is the second most
abundant metal in the earth's crust, and is widely used all over the
world, due to its properties and ability to produce steel as an alloy.
Describe the production of steels including the following in
chronological order:
· Extraction of Iron from its ore
· About the common impurities
· Elements combined to produce steel
· Different % of elements for different steels
(10)
2. This question is about salt making. There are four types of ways to
produce salts. Choose one salt production reaction to a produce a
particular salt, for example sodium chloride etc. Write the complete
method to produce this salt, including purification of the salt. Ensure
you include a balanced symbol equation for the reaction, and a general
equation for the type of salt production reaction you have chosen, e.g.
acid + .............. -> salt + .................. etc.
(10)

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Chemistry Revision
MARK SCHEME
How to use this mark scheme
All words or phrases presented with use of underlining/highlighting mean that
they account for marks, although marker should ensure that the answer is
structured properly in full sentences to allow full marks, with clearly described
information.
Q Topic Mark Scheme Marks
1 Metals · We extract iron from its ore using the blast
surface.…read more

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Carbon steels: 0.03-1.5% Carbon impurities.
Properties: cheapest steels. Used in bodies of
cars, knives, machinery, ships, containers,
structural steel for buildings.
Low-alloy steels: 1-5% of other metals. This
includes nickel, chromium, manganese,
vanadium, titanium and tungsten. Uses, e.g.
nickel steel used for bridge structures.
High-alloy steels: 12-15% of chromium mixed with
iron, often some nickel is mixed in too. Properties
are strong and chemically stable.
Stainless Steels: chromium and nickel steels.
Used in cooking to make utensils and cutlery.…read more

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Salts · Chosen type of reaction for one mark.
Introduction or within answer, you must include
understanding of which reaction is taking place
from the list below:
Acid + metal -> salt + hydrogen
Acid + base -> salt + water
Acid + alkali -> salt + water
Acid + carbonate -> salt + water + carbon dioxide
· Chosen reaction must be shown at some stage
including balanced symbol equation (word
equations do not account for any marks).…read more

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