Mark Scheme (Results)
Summer 2024
Pearson Edexcel GCSE
In Chemistry (1CH0)
Paper 2H
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We
provide a wide range of qualifications including academic, vocational, occupational and specific
programmes for employers. For further information visit our qualifications websites at
www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch with us using the
details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone progress in
their lives through education. We believe in every kind of learning, for all kinds of people, wherever they
are in the world. We’ve been involved in education for over 150 years, and by working across 70
countries, in 100 languages, we have built an international reputation for our commitment to high
standards and raising achievement through innovation in education. Find out more about how we can
help you and your students at: www.pearson.com/uk
Summer 2024
Question Paper Log Number P74426A
Publications Code 1CH0_2H_2406_MS
All the material in this publication is copyright
© Pearson Education Ltd 2024
,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.
, Question Answer Additional guidance Mark
number
1(a)(i) the less stone there is, the stronger the take ‘it’ to mean amount of stone (1)
concrete/ more stone, less strength AO3 1
Question Answer Mark
number
1(a)(ii) C 7500 kg is the only correct answer. (1)
AO3 1
A, B and D are incorrect because the sand: stone ratio is not 2:3
Question Answer Additional guidance Mark
number
1(a)(iii) giant covalent / macromolecular giant and covalent required (1)
ignore lattice AO3 1
reject ionic
Question Answer Mark
number
1(b)(i) D nanoparticles are larger than atoms and molecules is the only correct answer. (1)
AO1 1
A, B and C are incorrect because nanoparticles are made of a few hundred atoms
Question Answer Additional guidance Mark
number
1(b)(ii) an explanation linking any two from (2)
AO1 1
• {reflect/ absorb/ block/ protects from} UV ignore sun/ sunlight/ sun’s rays/ IR
(light) (1)
• so prevent {sunburn/ skin damage} (1) allow prevents (skin) cancer/ cell damage;
ignore ‘protects the skin’
• nanoparticles are {very small/ allow large SA: vol ratio
<100nm/ <1 x 10-7m } (1) ignore large surface area
Summer 2024
Pearson Edexcel GCSE
In Chemistry (1CH0)
Paper 2H
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We
provide a wide range of qualifications including academic, vocational, occupational and specific
programmes for employers. For further information visit our qualifications websites at
www.edexcel.com or www.btec.co.uk. Alternatively, you can get in touch with us using the
details on our contact us page at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone progress in
their lives through education. We believe in every kind of learning, for all kinds of people, wherever they
are in the world. We’ve been involved in education for over 150 years, and by working across 70
countries, in 100 languages, we have built an international reputation for our commitment to high
standards and raising achievement through innovation in education. Find out more about how we can
help you and your students at: www.pearson.com/uk
Summer 2024
Question Paper Log Number P74426A
Publications Code 1CH0_2H_2406_MS
All the material in this publication is copyright
© Pearson Education Ltd 2024
,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.
, Question Answer Additional guidance Mark
number
1(a)(i) the less stone there is, the stronger the take ‘it’ to mean amount of stone (1)
concrete/ more stone, less strength AO3 1
Question Answer Mark
number
1(a)(ii) C 7500 kg is the only correct answer. (1)
AO3 1
A, B and D are incorrect because the sand: stone ratio is not 2:3
Question Answer Additional guidance Mark
number
1(a)(iii) giant covalent / macromolecular giant and covalent required (1)
ignore lattice AO3 1
reject ionic
Question Answer Mark
number
1(b)(i) D nanoparticles are larger than atoms and molecules is the only correct answer. (1)
AO1 1
A, B and C are incorrect because nanoparticles are made of a few hundred atoms
Question Answer Additional guidance Mark
number
1(b)(ii) an explanation linking any two from (2)
AO1 1
• {reflect/ absorb/ block/ protects from} UV ignore sun/ sunlight/ sun’s rays/ IR
(light) (1)
• so prevent {sunburn/ skin damage} (1) allow prevents (skin) cancer/ cell damage;
ignore ‘protects the skin’
• nanoparticles are {very small/ allow large SA: vol ratio
<100nm/ <1 x 10-7m } (1) ignore large surface area
