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Pearson Edexcel International Advanced Level in Chemistry (WCH15) Paper 01 Transition Metals and Organic Nitrogen Chemistry Mark Scheme (Results) June 2024$12.99
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Pearson Edexcel International Advanced Level in Chemistry (WCH15) Paper 01 Transition Metals and Organic Nitrogen Chemistry Mark Scheme (Results) June 2024
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Course
Pearson Edexcel International Advanced Level
Institution
Pearson Edexcel International Advanced Level
Pearson Edexcel International Advanced Level in Chemistry (WCH15) Paper 01 Transition Metals
and Organic Nitrogen Chemistry Mark Scheme (Results) June 2024
Pearson Edexcel International Advanced Level in Chemistry (WCH15) Paper 01 Transition Metals
and Organic Nitrogen Chemistry Mark Scheme (Results) June 2024
Mark Scheme (Results)
June 2024
Pearson Edexcel International Advanced Level
in Chemistry (WCH15) Paper 01
Transition Metals and Organic Nitrogen
Chemistry
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All candidates must receive the same treatment. Examiners
must mark the first candidate in exactly the same way as they
mark the last.
Mark schemes should be applied positively. Candidates must
be rewarded for what they have shown they can do rather
than penalised for omissions.
Examiners should mark according to the mark scheme not
according to their perception of where the grade boundaries
may lie.
There is no ceiling on achievement. All marks on the mark
scheme should be used appropriately.
All the marks on the mark scheme are designed to be
awarded. Examiners should always award full marks if
deserved, i.e. if the answer matches the mark
scheme. Examiners should also be prepared to award zero
marks if the candidate’s response is not worthy of credit
according to the mark scheme.
Where some judgement is required, mark schemes will
provide the principles by which marks will be awarded and
exemplification may be limited.
When examiners are in doubt regarding the application of the
mark scheme to a candidate’s response, the team leader must
be consulted.
Crossed out work should be marked UNLESS the candidate
has replaced it with an alternative response.
, Section A (Multiple Choice)
Question Answer Mark
number
1 The only correct answer is B (green) (1)
A is incorrect because this is the colour of vanadium(IV)
C is incorrect because this is the colour of vanadium(II)
D is incorrect because this is the colour of vanadium(V)
Question Answer Mark
number
2 (1)
The only correct answer is C (SO2 → SO3, +5 → +4 → +5)
A is incorrect because this is not the step catalysed
B is incorrect because the vanadium is reduced
D is incorrect because this is not the step catalysed and the vanadium is reduced
Question Answer Mark
number
3(a) The only correct answer is A (II → III, VII → II) (1)
B is incorrect because the final oxidation number for manganese is incorrect
C is incorrect because the iron is oxidised and the manganese is reduced
D is incorrect because the iron is oxidised and the initial and final oxidation numbers of manganese are incorrect
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