Mark Scheme (Results)
January 2022
Pearson Edexcel International Advanced
Subsidiary Level
In Chemistry (WCH11)
Paper 01: Structure, Bonding and Introduction
to Organic Chemistry
,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
January 2022
Question Paper Log Number P67127A
Publications Code WCH11_01_2201_MS
All the material in this publication is copyright
© Pearson Education Ltd 2022
, 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.
, Section A
Question Answer Mark
Number
1(a) The only correct answer is C (XY2) (1)
A is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
B is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
D is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
Question Answer Mark
Number
1(b) The only correct answer is D (in the liquid state and in aqueous solution only) (1)
A is not correct because the ions do not move in the solid state
B is not correct because the ions do not move in the solid state
C is not correct because the ions do not move in the solid state
Question Answer Mark
Number
2 The only correct answer is B (NaF) (1)
A is not correct because the Cl- ion is larger than F- so ionic bonding is weaker in NaCl
C is not correct because the K+ ion is larger than Na+ and the Cl- ion is bigger than F-
D is not correct because the K+ ion is larger than Na+
January 2022
Pearson Edexcel International Advanced
Subsidiary Level
In Chemistry (WCH11)
Paper 01: Structure, Bonding and Introduction
to Organic Chemistry
,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
January 2022
Question Paper Log Number P67127A
Publications Code WCH11_01_2201_MS
All the material in this publication is copyright
© Pearson Education Ltd 2022
, 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.
, Section A
Question Answer Mark
Number
1(a) The only correct answer is C (XY2) (1)
A is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
B is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
D is not correct because Group 2 elements combine with Group 7 elements in the ratio 1:2
Question Answer Mark
Number
1(b) The only correct answer is D (in the liquid state and in aqueous solution only) (1)
A is not correct because the ions do not move in the solid state
B is not correct because the ions do not move in the solid state
C is not correct because the ions do not move in the solid state
Question Answer Mark
Number
2 The only correct answer is B (NaF) (1)
A is not correct because the Cl- ion is larger than F- so ionic bonding is weaker in NaCl
C is not correct because the K+ ion is larger than Na+ and the Cl- ion is bigger than F-
D is not correct because the K+ ion is larger than Na+
