A-LevelChemistryAnalytical techniques9701/12 · May/June 2011 · Q201 Mark

Which reagent gives the same visible result with propanal and with propan-2-ol?

A2,4-dinitrophenylhydrazine reagent

Bacidified potassium dichromate(VI)

Csodium

DTollens' reagent

✓ Correct answer

B: acidified potassium dichromate(VI)

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

Topic: Analytical techniques, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2011 Paper 1 Variant 2, question 20.

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

Which compounds react with alkaline aqueous iodine to give a pale yellow precipitate of tri-iodomethane? 1 butanone 2…

Qualitative Analysis At each stage of any test you are to record details of the following. • colour changes seen • th…

How many structural isomers with the molecular formula C₄H₁₀O give infra-red absorptions both at approximately 1200 c…

Which compounds can be obtained from but-2-ene in a single reaction? 1 CH₃CH(OH)CH(OH)CH₃ 2 CH₃CH(OH)CH₂CH₃ 3 CH₃CO₂H

Which statements help to explain the mechanism of the reaction between 1-chloropropane and ammonia? 1 1-chloropropane…

Hydrogen halides are compounds formed when halogens (Group 17 elements) react with hydrogen. The bond polarity of the…