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CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions

Practise the CAIE 9701 2,4-dinitrophenylhydrazine test, recording the yellow, orange or red precipitate that confirms an aldehyde or ketone carbonyl.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • add 2,4-dinitrophenylhydrazine reagent to the unknown organic liquid or solution
  • record a yellow, orange or red precipitate as a positive result for an aldehyde or ketone C=O group
  • state that 2,4-DNPH confirms a carbonyl but does not by itself distinguish aldehyde from ketone

CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions question 1

[Maximum number: 1]

Which compound will produce a yellow-orange precipitate when added to 2,4-dinitrophenylhydrazine?

A
Figure for Question CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions question 1 — CAIE A-Level Chemistry AS — Option A
B
Figure for Question CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions question 1 — CAIE A-Level Chemistry AS — Option B
C
Figure for Question CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions question 1 — CAIE A-Level Chemistry AS — Option C
D
Figure for Question CAIE A-Level Chemistry AS 17.1.4.2.4 Dnph Carbonyl Test Questions question 1 — CAIE A-Level Chemistry AS — Option D
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