Mark Scheme
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
Paper 2: Chemistry 1 (1SC0/1CF) –
Foundation Tier
, Edexcel Chemistry 1CF 2025 Predicted Question Paper
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.
, Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
Answer: C. Freezing Freezing: A physical change 1
01.a
where a liquid turns into a solid
as it loses thermal energy.
Particles move closer together
and arrange in a fixed lattice
structure.
Question Answers Extra information Mark
01.b 1. Graph Description: Graph description: 3
● X-axis labeled as • The plateau represents
"Time" and Y-axis the freezing point
labeled as where the substance
"Temperature". (1 transitions between
mark) liquid and solid states.
● Plateau at freezing During this phase
point. (1 mark) change, temperature
● Smooth decrease in remains constant as
temperature before energy is used to form
and after phase or break bonds.
change. (1 mark)
Question Answers Extra information Mark
Ice vs. water particles:
01.c ● Ice particles are arranged 2
in a fixed lattice structure. • In ice, particles are in a
(1 mark) fixed lattice, limiting their
movement. In liquid
● Water particles move water, particles are free
freely, allowing it to take to move and adjust to the
the container’s shape. (1 shape of the container.
mark)
3
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
Paper 2: Chemistry 1 (1SC0/1CF) –
Foundation Tier
, Edexcel Chemistry 1CF 2025 Predicted Question Paper
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.
, Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
Answer: C. Freezing Freezing: A physical change 1
01.a
where a liquid turns into a solid
as it loses thermal energy.
Particles move closer together
and arrange in a fixed lattice
structure.
Question Answers Extra information Mark
01.b 1. Graph Description: Graph description: 3
● X-axis labeled as • The plateau represents
"Time" and Y-axis the freezing point
labeled as where the substance
"Temperature". (1 transitions between
mark) liquid and solid states.
● Plateau at freezing During this phase
point. (1 mark) change, temperature
● Smooth decrease in remains constant as
temperature before energy is used to form
and after phase or break bonds.
change. (1 mark)
Question Answers Extra information Mark
Ice vs. water particles:
01.c ● Ice particles are arranged 2
in a fixed lattice structure. • In ice, particles are in a
(1 mark) fixed lattice, limiting their
movement. In liquid
● Water particles move water, particles are free
freely, allowing it to take to move and adjust to the
the container’s shape. (1 shape of the container.
mark)
3
