Name

iG Chem 14 EQ 15w to 01w P3 481marks By SUBTOPIC

14.1 - 3 Naming, fuels & homolo-

gous series

14.4 5 Alkanes and alkenes

14.6 Alcohols 14.7 Carboxylic acids & esters

14.82 Synthetic polymers

14.83 Natural polymers

0.0

5.0

10.0

15.0

20.0

25.0

PAPER 4 Topic 14 (Organic) (pre2016 called Paper 3)Percentage of all marks awarded for each subtopic from

s2001 to w2015 green triangle)

Paper 3 SubTopic Number

% o

f Mar

ks a

war

ded

for e

ach

topi

c

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14.1 - 3 Naming, fuels & homologous series Q# 1/ iGCSE Chemistry/2015/s/Paper 31/

14.1 - 3 Naming, fuels & homologous series Q# 2/ iGCSE Chemistry/2014/s/Paper 31/ Q3

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14.1 - 3 Naming, fuels & homologous series Q# 3/ iGCSE Chemistry/2013/w/Paper 31/

14.1 - 3 Naming, fuels & homologous series Q# 4/ iGCSE Chemistry/2013/s/Paper 31/

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14.1 - 3 Naming, fuels & homologous series Q# 5/ iGCSE Chemistry/2013/s/Paper 31/

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14.1 - 3 Naming, fuels & homologous series Q# 6/ iGCSE Chemistry/2011/w/Paper 31/

14.1 - 3 Naming, fuels & homologous series Q# 7/ iGCSE Chemistry/2010/s/Paper 31/

14.1 - 3 Naming, fuels & homologous series Q# 8/ iGCSE Chemistry/2009/w/Paper 3/Q7

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14.1 - 3 Naming, fuels & homologous series Q# 9/ iGCSE Chemistry/2009/w/Paper 3/ Q7

14.1 - 3 Naming, fuels & homologous series Q# 10/ iGCSE Chemistry/2009/w/Paper 3/

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14.1 - 3 Naming, fuels & homologous series Q# 11/ iGCSE Chemistry/2008/w/Paper 31/Q7 (a)

14.1 - 3 Naming, fuels & homologous series Q# 12/ iGCSE Chemistry/2008/w/Paper 31/Q4

14.1 - 3 Naming, fuels & homologous series Q# 13/ iGCSE Chemistry/2007/w/Paper 3/ Q6

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14.1 - 3 Naming, fuels & homologous series Q# 14/ iGCSE Chemistry/2007/s/Paper 3/

14.1 - 3 Naming, fuels & homologous series Q# 15/ iGCSE Chemistry/2005/w/Paper 3/

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14.1 - 3 Naming, fuels & homologous series Q# 16/ iGCSE Chemistry/2003/s/Paper 3/

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14.1 - 3 Naming, fuels & homologous series Q# 17/ iGCSE Chemistry/2002/w/Paper 3/

14.1 - 3 Naming, fuels & homologous series Q# 18/ iGCSE Chemistry/2002/w/Paper 3/

Patrick Brannac www. Smashing Science.org Page 13 of 81

14.4 5 Alkanes and alkenes Q# 19/ iGCSE Chemistry/2014/w/Paper 31/ Q6

14.4 5 Alkanes and alkenes Q# 20/ iGCSE Chemistry/2013/w/Paper 31/

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14.4 5 Alkanes and alkenes Q# 21/ iGCSE Chemistry/2013/w/Paper 31/

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14.4 5 Alkanes and alkenes Q# 22/ iGCSE Chemistry/2013/s/Paper 31/Q3

14.4 5 Alkanes and alkenes Q# 23/ iGCSE Chemistry/2012/w/Paper 31/Q6

14.4 5 Alkanes and alkenes Q# 24/ iGCSE Chemistry/2012/s/Paper 31/

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14.4 5 Alkanes and alkenes Q# 25/ iGCSE Chemistry/2011/s/Paper 31/

14.4 5 Alkanes and alkenes Q# 26/ iGCSE Chemistry/2010/w/Paper 31/Q5

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14.4 5 Alkanes and alkenes Q# 27/ iGCSE Chemistry/2010/s/Paper 31/

14.4 5 Alkanes and alkenes Q# 28/ iGCSE Chemistry/2009/w/Paper 3/

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14.4 5 Alkanes and alkenes Q# 29/ iGCSE Chemistry/2009/s/Paper 31/Q8

14.4 5 Alkanes and alkenes Q# 30/ iGCSE Chemistry/2008/w/Paper 31/Q7

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14.4 5 Alkanes and alkenes Q# 31/ iGCSE Chemistry/2007/s/Paper 3/ Q7

14.4 5 Alkanes and alkenes Q# 32/ iGCSE Chemistry/2006/w/Paper 3/ Q8

Patrick Brannac www. Smashing Science.org Page 20 of 81

14.4 5 Alkanes and alkenes Q# 33/ iGCSE Chemistry/2006/s/Paper 3/Q7

14.4 5 Alkanes and alkenes Q# 34/ iGCSE Chemistry/2006/s/Paper 3/Q7

14.4 5 Alkanes and alkenes Q# 35/ iGCSE Chemistry/2006/s/Paper 3/

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14.4 5 Alkanes and alkenes Q# 36/ iGCSE Chemistry/2004/w/Paper 3/Q8

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14.4 5 Alkanes and alkenes Q# 37/ iGCSE Chemistry/2004/w/Paper 3/

14.4 5 Alkanes and alkenes Q# 38/ iGCSE Chemistry/2004/s/Paper 3/Q6

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14.4 5 Alkanes and alkenes Q# 39/ iGCSE Chemistry/2003/s/Paper 3/

14.4 5 Alkanes and alkenes Q# 40/ iGCSE Chemistry/2003/s/Paper 3/

14.4 5 Alkanes and alkenes Q# 41/ iGCSE Chemistry/2002/w/Paper 3/

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14.4 5 Alkanes and alkenes Q# 42/ iGCSE Chemistry/2002/s/Paper 3/

14.4 5 Alkanes and alkenes Q# 43/ iGCSE Chemistry/2001/w/Paper 3/ QiGCSE Chemistry/201 (a)

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14.4 5 Alkanes and alkenes Q# 44/ iGCSE Chemistry/2001/w/Paper 3/

14.4 5 Alkanes and alkenes Q# 45/ iGCSE Chemistry/2001/w/Paper 3/

Patrick Brannac www. Smashing Science.org Page 26 of 81

14.6 Alcohols Q# 46/ iGCSE Chemistry/2015/s/Paper 31/ Q4

14.6 Alcohols Q# 47/ iGCSE Chemistry/2008/s/Paper 31/ Q6

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14.6 Alcohols Q# 48/ iGCSE Chemistry/2008/s/Paper 31/ Q5

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14.6 Alcohols Q# 49/ iGCSE Chemistry/2005/s/Paper 3/ Q5

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14.6 Alcohols Q# 50/ iGCSE Chemistry/2001/w/Paper 3/

14.7 Carboxylic acids & esters Q# 51/ iGCSE Chemistry/2015/w/Paper 31/ NOT w/ith 5(a)Q5 Compound X has/ the molecular formula of C4H6O2

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14.7 Carboxylic acids & esters Q# 52/ iGCSE Chemistry/2015/s/Paper 31/ Q4

14.7 Carboxylic acids & esters Q# 53/ iGCSE Chemistry/2014/w/Paper 31/

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14.7 Carboxylic acids & esters Q# 54/ iGCSE Chemistry/2012/s/Paper 31/

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14.7 Carboxylic acids & esters Q# 55/ iGCSE Chemistry/2011/s/Paper 31/ Q6 (a)

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14.7 Carboxylic acids & esters Q# 56/ iGCSE Chemistry/2010/s/Paper 31/

14.7 Carboxylic acids & esters Q# 57/ iGCSE Chemistry/2010/s/Paper 31/

14.7 Carboxylic acids & esters Q# 58/ iGCSE Chemistry/2009/w/Paper 3/Q7b

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14.7 Carboxylic acids & esters Q# 59/ iGCSE Chemistry/2008/w/Paper 31/Q7

14.7 Carboxylic acids & esters Q# 60/ iGCSE Chemistry/2008/w/Paper 31/

Patrick Brannac www. Smashing Science.org Page 35 of 81

14.7 Carboxylic acids & esters Q# 61/ iGCSE Chemistry/2007/w/Paper 3/ Q6

14.7 Carboxylic acids & esters Q# 62/ iGCSE Chemistry/2007/s/Paper 3/

14.7 Carboxylic acids & esters Q# 63/ iGCSE Chemistry/2006/w/Paper 3/ Q8

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14.7 Carboxylic acids & esters Q# 64/ iGCSE Chemistry/2005/w/Paper 3/ QiGCSE Chemistry/201

14.7 Carboxylic acids & esters Q# 65/ iGCSE Chemistry/2005/w/Paper 3/ Q4 (c)

14.7 Carboxylic acids & esters Q# 66/ iGCSE Chemistry/2005/s/Paper 3/Q3

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14.7 Carboxylic acids & esters Q# 67/ iGCSE Chemistry/2004/w/Paper 3/Q3

14.7 Carboxylic acids & esters Q# 68/ iGCSE Chemistry/2004/s/Paper 3/Q6

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14.7 Carboxylic acids & esters Q# 69/ iGCSE Chemistry/2003/w/Paper 3/

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14.7 Carboxylic acids & esters Q# 70/ iGCSE Chemistry/2002/s/Paper 3/

14.7 Carboxylic acids & esters Q# 71/ iGCSE Chemistry/2001/w/Paper 3/

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14.82 Synthetic polymersQ# 72/ iGCSE Chemistry/2015/w/Paper 31/

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14.82 Synthetic polymersQ# 73/ iGCSE Chemistry/2014/w/Paper 31/Q6

14.82 Synthetic polymersQ# 74/ iGCSE Chemistry/2014/s/Paper 31/

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14.82 Synthetic polymersQ# 75/ iGCSE Chemistry/2013/w/Paper 31/

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14.82 Synthetic polymersQ# 76/ iGCSE Chemistry/2012/s/Paper 31/

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14.82 Synthetic polymersQ# 77/ iGCSE Chemistry/2011/w/Paper 31/Q6

14.82 Synthetic polymersQ# 78/ iGCSE Chemistry/2011/s/Paper 31/ Q8

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14.82 Synthetic polymersQ# 79/ iGCSE Chemistry/2011/s/Paper 31/

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14.82 Synthetic polymersQ# 80/ iGCSE Chemistry/2010/w/Paper 31/

14.82 Synthetic polymersQ# 81/ iGCSE Chemistry/2010/w/Paper 31/

(b)

14.82 Synthetic polymersQ# 82/ iGCSE Chemistry/2010/s/Paper 31/Q4

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14.82 Synthetic polymersQ# 83/ iGCSE Chemistry/2009/s/Paper 31/

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14.82 Synthetic polymersQ# 84/ iGCSE Chemistry/2008/w/Paper 31/Q7

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14.82 Synthetic polymersQ# 85/ iGCSE Chemistry/2007/s/Paper 3/

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14.82 Synthetic polymersQ# 86/ iGCSE Chemistry/2005/s/Paper 3/Q5(a)

14.82 Synthetic polymersQ# 87/ iGCSE Chemistry/2005/s/Paper 3/

14.82 Synthetic polymersQ# 88/ iGCSE Chemistry/2004/w/Paper 3/ Q6 (b)

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14.82 Synthetic polymersQ# 89/ iGCSE Chemistry/2004/w/Paper 3/

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14.82 Synthetic polymersQ# 90/ iGCSE Chemistry/2003/w/Paper 3/

14.82 Synthetic polymersQ# 91/ iGCSE Chemistry/2003/s/Paper 3/Q3 (d)

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14.82 Synthetic polymersQ# 92/ iGCSE Chemistry/2003/s/Paper 3/

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14.82 Synthetic polymersQ# 93/ iGCSE Chemistry/2002/w/Paper 3/ Q5

14.83 Natural polymers Q# 94/ iGCSE Chemistry/2015/w/Paper 31/

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14.83 Natural polymers Q# 95/ iGCSE Chemistry/2012/w/Paper 31/

[2]

[1]

14.83 Natural polymers Q# 96/ iGCSE Chemistry/2011/w/Paper 31/ Q6

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14.83 Natural polymers Q# 97/ iGCSE Chemistry/2008/s/Paper 31/

14.83 Natural polymers Q# 98/ iGCSE Chemistry/2006/w/Paper 3/

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14.83 Natural polymers Q# 99/ iGCSE Chemistry/2005/s/Paper 3/Q5(a)

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14.83 Natural polymers Q# 100/ iGCSE Chemistry/2004/s/Paper 3/

14.83 Natural polymers Q# 101/ iGCSE Chemistry/2003/w/Paper 3/ Q2

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14.83 Natural polymers Q# 102/ iGCSE Chemistry/2003/w/Paper 3/

14.83 Natural polymers Q# 103/ iGCSE Chemistry/2002/s/Paper 3/

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[3]

[1]

Mark SchemeQ# 1/ iGCSE Chemistry/2015/s/Paper 31/

Q# 2/ iGCSE Chemistry/2014/s/Paper 31/ Q3

Q# 3/ iGCSE Chemistry/2013/w/Paper 31/

Q# 4/ iGCSE Chemistry/2013/s/Paper 31/

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Q# 5/ iGCSE Chemistry/2013/s/Paper 31/

Q# 6/ iGCSE Chemistry/2011/w/Paper 31/

Q# 7/ iGCSE Chemistry/2010/s/Paper 31/

Q# 8/ iGCSE Chemistry/2009/w/Paper 3/

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Q# 9/ iGCSE Chemistry/2009/w/Paper 3/ Q7

Q# 10/ iGCSE Chemistry/2009/w/Paper 3/

Q# 11/ iGCSE Chemistry/2008/w/Paper 31/Q7

Q# 12/ iGCSE Chemistry/2008/w/Paper 31/Q4

Q# 13/ iGCSE Chemistry/2007/w/Paper 3/ Q6

Q# 14/ iGCSE Chemistry/2008/s/Paper 31/

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Q# 15/ iGCSE Chemistry/2005/w/Paper 3/

Q# 16/ iGCSE Chemistry/2003/s/Paper 3/

Q# 17/ iGCSE Chemistry/2002/w/Paper 3/

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Q# 18/ iGCSE Chemistry/2002/w/Paper 3/

Q# 19/ iGCSE Chemistry/2014/w/Paper 31/ Q6

Q# 20/ iGCSE Chemistry/2013/w/Paper 31/

Q# 21/ iGCSE Chemistry/2013/w/Paper 31/

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Q# 22/ iGCSE Chemistry/2013/s/Paper 31/Q3

Q# 23/ iGCSE Chemistry/2012/w/Paper 31/

Q# 24/ iGCSE Chemistry/2012/s/Paper 31/

Q# 25/ iGCSE Chemistry/2011/s/Paper 31/

Q# 26/ iGCSE Chemistry/2010/w/Paper 31/

Q# 27/ iGCSE Chemistry/2010/s/Paper 31/

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Q# 28/ iGCSE Chemistry/2009/w/Paper 3/

Q# 29/ iGCSE Chemistry/2009/s/Paper 31/Q8

Q# 30/ iGCSE Chemistry/2008/w/Paper 31/Q7

Q# 31/ 7iGCSE Chemistry/2008/s/Paper 31/ Q7

Q# 32/ iGCSE Chemistry/2006/w/Paper 3/ Q8

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Q# 33/ iGCSE Chemistry/2006/s/Paper 3/Q7

Q# 34/ iGCSE Chemistry/2006/s/Paper 3/

Q# 35/ iGCSE Chemistry/2006/s/Paper 3/

Q# 36/ iGCSE Chemistry/2004/w/Paper 3/Q8

Q# 37/ iGCSE Chemistry/2004/w/Paper 3/

Q# 38/ iGCSE Chemistry/2004/s/Paper 3/Q6

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Q# 39/ iGCSE Chemistry/2003/s/Paper 3/

Q# 40/ iGCSE Chemistry/2003/s/Paper 3/Q3

Q# 41/ iGCSE Chemistry/2002/w/Paper 3/

Q# 42/ iGCSE Chemistry/2002/s/Paper 3/Q3

Q# 43/ iGCSE Chemistry/2001/w/Paper 3/ QiGCSE Chemistry/201 (a)

Q# 44/ iGCSE Chemistry/2001/w/Paper 3/

Q# 45/ iGCSE Chemistry/2001/w/Paper 3/

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Q# 46/ iGCSE Chemistry/2015/s/Paper 31/

Q# 47/ iGCSE Chemistry/2008/s/Paper 31/ Q5

This answer here is a good example of the published mark scheme being most likely different to the mark scheme the examiners used. It seems like the answer should be “to prevent the exothermic reaction from overheating the mixture and killing the yeast by denaturing the enzymes”. The examiner’s report, below, adds a little more detail, but this is still a terrible question.

Back to the mark scheme:

Q# 48/ iGCSE Chemistry/2008/s/Paper 31/ Q5

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Q# 49/ iGCSE Chemistry/2005/s/Paper 3/ Q5

Q# 50/ iGCSE Chemistry/2001/w/Paper 3/Q2

Q# 51/ iGCSE Chemistry/2015/w/Paper 31/

Q# 52/ iGCSE Chemistry/2015/s/Paper 31/

Q# 53/ iGCSE Chemistry/2014/w/Paper 31/

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Q# 54/ iGCSE Chemistry/2012/s/Paper 31/

Q# 55/ iGCSE Chemistry/2011/s/Paper 31/ Q6 (a)

Q# 56/ iGCSE Chemistry/2010/s/Paper 31/

Q# 57/ iGCSE Chemistry/2010/s/Paper 31/

Q# 58/ iGCSE Chemistry/2009/w/Paper 3/

Q# 59/ iGCSE Chemistry/2008/w/Paper 31/Q7

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Q# 60/ iGCSE Chemistry/2008/w/Paper 31/

Q# 61/ iGCSE Chemistry/2007/w/Paper 3/ Q6

Q# 62/ iGCSE Chemistry/2008/s/Paper 31/

Q# 63/ iGCSE Chemistry/2006/w/Paper 3/ Q8

Q# 64/ iGCSE Chemistry/2005/w/Paper 3/ QiGCSE Chemistry/201

Q# 65/ iGCSE Chemistry/2005/w/Paper 3/ Q4

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Q# 66/ iGCSE Chemistry/2005/s/Paper 3/Q3

Q# 67/ iGCSE Chemistry/2004/w/Paper 3/Q3

Q# 68/ iGCSE Chemistry/2004/s/Paper 3/Q6

Q# 69/ iGCSE Chemistry/2003/w/Paper 3/

Q# 70/ iGCSE Chemistry/2002/s/Paper 3/Q2

Patrick Brannac www. Smashing Science.org Page 74 of 81

Q# 71/ iGCSE Chemistry/2001/w/Paper 3/Q2

Q# 72/ iGCSE Chemistry/2015/w/Paper 31/

Q# 73/ iGCSE Chemistry/2014/w/Paper 31/Q6

Q# 74/ iGCSE Chemistry/2014/s/Paper 31/

Patrick Brannac www. Smashing Science.org Page 75 of 81

Q# 75/ iGCSE Chemistry/2013/w/Paper 31/

Q# 76/ iGCSE Chemistry/2012/s/Paper 31/

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Q# 77/ iGCSE Chemistry/2011/w/Paper 31/

Q# 78/ iGCSE Chemistry/2011/s/Paper 31/ Q8

Q# 79/ iGCSE Chemistry/2011/s/Paper 31/

Q# 80/ iGCSE Chemistry/2010/w/Paper 31/

Q# 81/ iGCSE Chemistry/2010/w/Paper 31/ Q5 (b)

Q# 82/ iGCSE Chemistry/2010/s/Paper 31/

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Q# 83/ iGCSE Chemistry/2009/s/Paper 31/

Q# 84/ iGCSE Chemistry/2008/w/Paper 31/Q7

Q# 85/ iGCSE Chemistry/2008/s/Paper 31/

Q# 86/ iGCSE Chemistry/2005/s/Paper 3/Q5 (a)

Q# 87/ iGCSE Chemistry/2005/s/Paper 3/

Patrick Brannac www. Smashing Science.org Page 78 of 81

Q# 88/ iGCSE Chemistry/2004/w/Paper 3/ Q6 (b)

Q# 89/ iGCSE Chemistry/2004/w/Paper 3/

Q# 90/ iGCSE Chemistry/2003/w/Paper 3/

Q# 91/ iGCSE Chemistry/2003/s/Paper 3/Q3

Q# 92/ iGCSE Chemistry/2003/s/Paper 3/Q3

Patrick Brannac www. Smashing Science.org Page 79 of 81

Q# 93/ iGCSE Chemistry/2002/w/Paper 3/ Q5

Q# 94/ iGCSE Chemistry/2015/w/Paper 31/

Q# 95/ iGCSE Chemistry/2012/w/Paper 31/

Q# 96/ iGCSE Chemistry/2011/w/Paper 31/ Q6

Q# 97/ iGCSE Chemistry/2008/s/Paper 31/

Patrick Brannac www. Smashing Science.org Page 80 of 81

Q# 98/ iGCSE Chemistry/2006/w/Paper 3/

Q# 99/ iGCSE Chemistry/2005/s/Paper 3/Q5 (a)

Q# 100/ iGCSE Chemistry/2004/s/Paper 3/

Q# 101/ iGCSE Chemistry/2003/w/Paper 3/ Q2

Q# 102/ iGCSE Chemistry/2003/w/Paper 3/

Q# 103/ iGCSE Chemistry/2002/s/Paper 3/

Patrick Brannac www. Smashing Science.org Page 81 of 81