logo

Cambridge IGCSE Chemistry practice

Paper 3 structured question: Chromatography

Try the question first, then check the answer and practise the same topic again.

Attempt questionChromatography revisionRevise the key idea

At a glance

3

Paper

1

Marks

Topic

Chromatography

Exam-style question

Try this first

Paper 3Theory (Core)1 marks

Analysis of a chromatogram from a mixture of dyes.

Description

Chromatogram of Dyes

The chromatogram shows three distinct spots labeled A, B, and C, with Rf values of 0.5, 0.3, and 0.7 respectively.

  1. a

    State What can you conclude about the purity of the substance represented by spot A?

    Aim for approximately 1 distinct marking point.

    [1]

0 of 1 part answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Related flashcards

Flashcard 1 of 6

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

Choose an answer, get feedback, then move sideways through the set.

0 of 4 attempted

Paper 3 structured question: Chromatography

Paper 3Theory (Core)2 marks

Data Table

Chromatography Results

The table compares Rf values of unknown substances with known standards.

SubstanceRf Value
Unknown 10.4
Known A0.4
Known B0.6
Unknown 20.5
Known C0.5
  1. a

    Determine Which unknown substance matches a known substance?

    Aim for approximately 2 distinct marking points.

    [2]