A-LevelChemistryHydroxy compounds9701/12 · Oct/Nov 2021 · Q271 Mark

Structural and stereoisomerism should be taken into account when answering this question. An organic compound, X, is dehydrated by heating with concentrated phosphoric(V) acid. Only two organic products are formed. What could be X?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Amolecule of pentan-1-ol (CH3CH2CH2CH2CH2OH).

Bmolecule of pentan-2-ol (CH3CH(OH)CH2CH2CH3).

Cmolecule of 2-methylbutan-1-ol (CH2OH-CH(CH3)-CH2-CH3).

Dmolecule of 3-methylbutan-2-ol (CH3-CH(OH)-CH(CH3)-CH3).

✓ Correct answer

A: molecule of pentan-1-ol (CH3CH2CH2CH2CH2OH).

Oracle Prep sorts past-paper questions by topic, so you can drill Hydroxy compounds and see which topics are most likely to come up next.

Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 2, question 27.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content