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CAIE IGCSE Chemistry 12.3.3 Paper Chromatography Is Used to Questions

Work through real CAIE IGCSE Chemistry questions to detect and identify colourless chromatography components after separation.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • describe using a locating agent to reveal separated colourless substances on a chromatogram
  • explain that the solvent separates the mixture while the locating agent makes colourless spots visible
  • use R_f values and comparison with standards to identify colourless amino acids or sugars
  • describe a complete workflow of hydrolysis where relevant, chromatography separation, locating-agent detection and R_f identification

CAIE IGCSE Chemistry 12.3.3 Paper Chromatography Is Used to Questions question 1

[Maximum number: 1]

Which statement about chromatography is correct?

A

It is not possible for two different substances to have the same RfR_{\mathrm{f}} value.

B

It is only possible to use chromatography on substances which have a colour.

C

It is possible to use chromatography on colourless substances using a locating agent.

D

The RfR_{\mathrm{f}} value of a substance = the distance travelled by the solvent  the distance travelled by the substance =\frac{\text { the distance travelled by the solvent }}{\text { the distance travelled by the substance }}

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