Edexcel Jan 2017 (IAL) Paper 4 Q20 (with explained solutions) |

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Edexcel Jan 2017 (IAL) Paper 4 Q20

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20 The infrared spectrum of a compound is shown. Relative transmittance 0.8 0.6 0.4 0.2 3000 2000 1000 Wavenumber/cm1 Use the information on pages 5 and 6 of your Data Booklet to identify which compound produced this spectrum. A C 3H7CHO B CH 3COC2H5 C CH 3CH CHCH2OH D C 5H12 TOTAL FOR SECTION A = 20 MARKS (Total for Question 20 = 1 mark) A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D *P48372RA0928* Turn over<br />

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Correct Answer A B C D Propanone cannot be oxidised to an acid Reduction of propanal would form an alcohol Correct The acid produced would be methanoic Correct Answer A B C D Correct Both compounds contain C-C and C-H bonds only Both compounds contain C-C ,C-H, C-O and O-H bonds only Both compounds contain C-C, C-H, C-O and C=O bonds only Correct Answer A It is carried out at temperatures where samples have been vaporised It cannot be used if the samples have decomposed It a cannot be used if the samples cannot be vaporised Correct B C D A B C D Correct Answer C2H2Cl would have mass 61 with these isotopes C2H2Cl would have mass 65 with these isotopes C2H2Cl would have mass 65 with these isotopes Correct Correct Answer A B C D Correct No peak at 1700-1680 cm-1 for a ketone No peak at 3750-3200 cm-1 for an alcohol Alkane would not have a peak at 1750 cm-1 Mark Mark Mark Mark Mark Question Number 16 Question Number 17 Question Number 18 Question Number 19 Question Number 20<br />

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