Chromatography — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

14 The dyes in a sweet are separated using chromatography. sweet dye 1 dye 2 dye 3 dye 4 Which dyes are present in the sweet? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0654/22 May/June 2017

22 The colours in an ink can be separated by chromatography. Which diagram shows the correct way to set up the apparatus? A B spot of ink spot of ink solvent solvent C D spot of ink spot of ink solvent solvent

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2019

21 The colours in an ink can be separated by chromatography. Which diagram shows the correct way to set up the apparatus? A B spot of ink spot of ink solvent solvent C D spot of ink spot of ink solvent solvent

1 marks

Answer: C

This question in 0654/22 Oct/Nov 2019

20 The colours in an ink can be separated by chromatography. Which diagram shows the correct way to set up the apparatus? A B spot of ink spot of ink solvent solvent C D spot of ink spot of ink solvent solvent

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2019

14 Which process is used to separate a mixture of coloured compounds? A chromatography B distillation C evaporation D filtration

1 marks

Answer: A

This question in 0654/22 Feb/March 2021

15 A chromatogram of four different inks, W, X, Y and Z, is shown. solvent 20 front 18 16 14 12 10 8 6 4 2 0 W X Y Z How many inks contain a dye with an Rf value of 0.7? A 0 B 1 C 2 D 3

1 marks

Answer: C

This question in 0654/23 May/June 2021

14 Dye X is a mixture of different coloured substances. Chromatography is used to compare X with three other mixtures, P, Q and R. The results are shown. X P Q R Which mixtures contain dye X? A P, Q and R B P and Q only C P only D R only

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2023

14 The colours in an ink are separated by chromatography. Which diagram shows the assembled apparatus? A B spot of ink spot of ink solvent solvent C D spot of ink spot of ink solvent solvent

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2023

27 The chromatogram of four different inks is shown. Which ink has an Rf value of 0.53? solvent front A D 10 cm B C baseline

1 marks

Answer: B

This question in 0654/22 Feb/March 2025

27 The chromatogram of four substances is shown. Which substance has an Rf value of 0.25? solvent front 10 cm 8 cm 6 cm 4 cm 2 cm baseline 0 cm A B C D

1 marks

Answer: B

This question in 0654/21 May/June 2025

26 A chromatography experiment is performed on a coloured solution. The solution contains substance Y. The chromatogram is shown. solvent front t Y r s baseline How is the Rf value of substance Y calculated? A r  s B s  r C s  t D t  s

1 marks

Answer: B

This question in 0654/23 May/June 2025

26 The chromatogram for substances P, Q, R and S is shown. solvent front baseline P Q R S Which statement is correct? A P and R are both pure substances. B P has a higher Rf value than Q. C R is a mixture of P and Q. D S is a mixture of Q and one other substance.

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2025

27 The boiling points of three substances, W, X and Y, are shown. W X Y boiling point / °C 116–118 132 141–145 The substances are tested using chromatography. The chromatogram is shown. W X Y Which statement is correct? A One of the components of Y has a boiling point of 132 °C. B Substance Y has a smaller boiling point range than substance W. C Substance W produces the largest Rf value. D Substance X is an impure mixture.

1 marks

Answer: A

This question in 0654/22 Oct/Nov 2025