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CAIE A-Level Chemistry AS 17.1.1 Preparation of Aldehydes and Ketones Questions

Practise preparing carbonyl compounds by choosing acidified dichromate or manganate(VII), distillation and reflux conditions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • oxidise a primary alcohol and distil the aldehyde as it forms to prevent further oxidation
  • oxidise a secondary alcohol under acidified dichromate or manganate(VII) conditions to form a ketone
  • choose reflux with excess oxidant only when complete oxidation of a primary alcohol to an acid is required

CAIE A-Level Chemistry AS 17.1.1 Preparation of Aldehydes and Ketones Questions question 1

[Maximum number: 2]

Compound X contains the same functional groups as citric acid.

citric acid

citric acid

The table describes some of the similarities and differences between citric acid and compound X.

Table for Question CAIE A-Level Chemistry AS 17.1.1 Preparation of Aldehydes and Ketones Questions question 1 — CAIE A-Level Chemistry AS

Explain why compound X reacts with acidified Cr2O72−\mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-} but citric acid does not.

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