AQA Specimen Paper 2 Q4 (with Explained Solutions) | - LearnAh!

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AQA Specimen Paper 2 Q4

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12 0 4 Alcohol A (CH3)2CHCH(OH)CH3 undergoes reactions separately with acidified potassium dichromate(VI) and with concentrated sulfuric acid. . 1 Deduce the IUPAC name for alcohol A. [1 mark] . 2 0 4 Draw the structure of the organic product, B, formed when A is oxidised in the reaction with acidified potassium dichromate(VI). [1 mark] . 3 0 4 Two isomeric alkenes, C and D, are formed when A is dehydrated in the reaction with concentrated sulfuric acid. Name the mechanism for this dehydration reaction. 0 4 . 4 Draw the structure of each isomer. Isomer C Isomer D [1 mark] [2 marks] Barcode Typesetter codebr / 13 0 4 . 5 Name the type of structural isomerism shown by C and D. [1 mark] . 6 0 4 List alcohol A, product B and isomer C in order of increasing boiling point. [1 mark] 0 4 . 7 Draw the structure of the isomer of A that is not oxidised by acidified potassium dichromate(VI). [1 mark] . 8 0 4 Draw the structure of the isomer of A that cannot be dehydrated to form an alkene by reaction with concentrated sulfuric acid. [1 mark] Turn over for the next question Barcode Typesetter code Turn over br / Show answer MARK SCHEMEA-level ChemistrySpecimen paper 2 Marking guidance Mark AO Comments AO1a AO2g Allow (CH3)2CHCOCH3 AO2g Allow (CH3)2C=CHCH3 AO1a AO2g Allow (CH3)2CHCH=CH2 8 of 20 Question 04.1 04.2 3-methylbutan-2-ol CH3 H3C CH3 04.3 04.4 Elimination CH3 H3C CH3 H3C CH3 H H CH2br / 04.5 Position 04.6 C B A 04.7 CH3 H3C CH2CH3 OH CH3 H3C CH2OH CH3 04.8 MARK SCHEMEA-level ChemistrySpecimen paper 2 1 1 AO1a AO3 1b AO2g Allow (CH3)2C(OH)CH2CH3 AO2e Allow (CH3)3CCH2OH 9 of 20br / Question 1 2 3 4 5 6 7 8 9 10 11 12

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