Pearson Edexcel GCE
In Chemistry (9CH0)
Paper 02: Advanced Organic and Physical
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.
, Using the Mark scheme
Examiners should look for qualities to reward rather than faults to penalise. This does
NOT mean giving credit for incorrect or inadequate answers, but it does mean
allowing candidates to be rewarded for answers showing correct application of
principles and knowledge. Examiners should therefore read carefully and consider
every response: even if it is not what is expected it may be worthy of credit.
The Mark scheme gives examiners:
• an idea of the types of response expected
• how individual Marks are to be awarded
• the total Mark for each question
• examples of responses that should NOT receive credit.
/ means that the responses are alternatives and either answer should receive full
credit. ( ) means that a phrase/word is not essential for the award of the Mark, but
helps the examiner to get the sense of the expected answer.
Phrases/words in bold indicate that the meaning of the phrase or the actual word is
essential to the answer. ecf/TE/cq (error carried forward) means that a wrong
answer given in an earlier part of a question is used correctly in answer to a later part
of the same question.
Candidates must make their meaning clear to the examiner to gain the Mark. Make
sure that the answer makes sense. Do not give credit for correct words/phrases which
are put together in a meaningless manner. Answers must be in the correct context.
Quality of Written Communication
Questions which involve the writing of continuous prose will expect candidates to:
• write legibly, with accurate use of spelling, grammar and punctuation in order to
make the meaning clear
• select and use a form and style of writing appropriate to purpose and to complex
subject matter
• organise information clearly and coherently, using specialist vocabulary when
appropriate.
Full Marks will be awarded if the candidate has demonstrated the above abilities.
Questions where QWC is likely to be particularly important are indicated (QWC) in the
Mark scheme, but this does not preclude others.
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