CIE iGCSE Co-Ordinated Science C12.3 Chromatography Exam Style Questions Paper 1
Question
The colours in an ink are separated by chromatography.
Which diagram shows the assembled apparatus?
▶️Answer/Explanation
Ans: C
Question
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.
Which mixtures contain dye X?
(A) P, Q and R
(B) P and Q only
(C) P only
(D R only
▶️Answer/Explanation
Ans : C
Question
Which process is used to separate a mixture of coloured compounds?
A. chromatography
B. distillation
C. evaporation
D. filtration
▶️Answer/Explanation
Answer: A. chromatography
Explanation: Chromatography is a technique used to separate mixtures of coloured compounds based on their different solubilities in a solvent. The compounds move at different rates, allowing them to be separated.
Question
The colours in an ink can be separated by chromatography. Which diagram shows the correct way to set up the apparatus?
▶️Answer/Explanation
Answer: C
Explanation: In chromatography, the solvent should move up the paper, carrying the ink components with it, and the spot of ink should be placed above the solvent level.