Mark Scheme (Results)
Summer 2024
Pearson Edexcel GCSE
In Chemistry (1CH0)
Paper 1H
,General Marking Guidance
• 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.
,Paper 1H Higher Tier
Question Answer Additional guidance Mark
number
1(a) A description to include two from mark independently (2)
AO2-2
• shows a constant voltage (1) ignore initially increases (when connected)
• decreases (1)
• to 0 (v) (1)
Question Answer Mark
number
1(b) D iron has a high density is the only correct answer (1)
AO1-1
A, B and C are incorrect as they are not typical properties of transition metals
Question Answer Mark
number
1(c) B 0.252 is the only correct answer (1)
AO2-1
A, C and D are mathematically incorrect
, Question Answer Additional guidance Mark
number
1(d) An explanation linking (2)
AO3-2
• alloy C is the strongest (1) allow 3rd alloy
with any one of the following MP2 depends on MP1
• alloy C has most atoms of a different allow contains most copper (atoms / ions)
size (1) allow most particles of different size
allow highest copper to zinc ratio
• greatest disruption of layers of (zinc) allow has the most irregular structure
atoms / most difficult for layers to
slide over one another (1)
ignore ‘has an irregular structure’ alone
Total for question 01 = 6 marks
Summer 2024
Pearson Edexcel GCSE
In Chemistry (1CH0)
Paper 1H
,General Marking Guidance
• 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.
,Paper 1H Higher Tier
Question Answer Additional guidance Mark
number
1(a) A description to include two from mark independently (2)
AO2-2
• shows a constant voltage (1) ignore initially increases (when connected)
• decreases (1)
• to 0 (v) (1)
Question Answer Mark
number
1(b) D iron has a high density is the only correct answer (1)
AO1-1
A, B and C are incorrect as they are not typical properties of transition metals
Question Answer Mark
number
1(c) B 0.252 is the only correct answer (1)
AO2-1
A, C and D are mathematically incorrect
, Question Answer Additional guidance Mark
number
1(d) An explanation linking (2)
AO3-2
• alloy C is the strongest (1) allow 3rd alloy
with any one of the following MP2 depends on MP1
• alloy C has most atoms of a different allow contains most copper (atoms / ions)
size (1) allow most particles of different size
allow highest copper to zinc ratio
• greatest disruption of layers of (zinc) allow has the most irregular structure
atoms / most difficult for layers to
slide over one another (1)
ignore ‘has an irregular structure’ alone
Total for question 01 = 6 marks
