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Edexcel GCE In Chemistry (9CH0) Paper 03: General and Practical Principles in Chemistry may 2023
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Edexcel GCE In Chemistry (9CH0) Paper 03: General and Practical Principles in Chemistry may 2023
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[Date] Pearson EdexcelGCE In
Chemistry
(9CH0) Paper 03
: General and Practical Principles
in Chemistry
[Author name]
[COMPANY NAME]
,Instructions
• Use
• IfFillpencil
black ink or ball-point pen.
is used for diagrams/sketches/graphs it must be dark (HB or B).
• in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all
• Answer
provided
the questions in the spaces
questions.– there may be more space than
you need.
Information
• The
• The
total mark for this paper is 120.
marks for each question are shown in brackets
• For the question marked with an asterisk (*), marks will be awarded for
– use this as a guide as to how much time to spend on each question.
your ability to structure your answer logically, showing the points that you
• make are related or follow on from each other where appropriate.
A Periodic Table is printed on the back cover of this paper.
Advice
• Read
•
each question carefully before you start to answer it.
Show all your working in calculations and include units where appropriate.
, • Check your answers if you have time at the end.
Answer ALL questions. Write your answers in the spaces
provided.
1 Alkanes are often used as fuels.
(a) Complete the equation for the complete combustion of
hexane. State symbols are not required. (1)
C6H14 + . . . ... .. .. ... .. O2 → .. .. ... .. .. ... . CO2 +.........H2O
(b) Identify two pollutants produced from the incomplete combustion of a
pure sample of pentane. (2)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
(c) Explain the problem which results from sulfur impurities in
fuels. (2)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
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......................
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......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. . . .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. . ..
......................
(d) Adding cyclic hydrocarbons to fuels results in more efficient
combustion. These compounds can be made by reforming straight-
chain alkanes.
Write an equation for the reforming of pentane into a cyclic hydrocarbon, using
skeletal formulae for the organic compounds.
State symbols are not required.
(2)
2
, (Total for Question 1 = 7 marks)
3
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