CIE iGCSE Co-Ordinated Science C12.4 Separation and purification Exam Style Questions Paper 1
Question
A mixture contains solid P dissolved in liquid Q.
Which process is used to obtain a pure sample of liquid Q from this mixture?
A crystallisation
B distillation
C evaporation
D paper chromatography
▶️Answer/Explanation
Ans : B
Question
A student adds excess copper oxide powder to warm dilute sulfuric acid.
Aqueous copper sulfate is formed.
Which method is used to remove the unreacted copper oxide?
A chromatography
B crystallisation
C distillation
D filtration
▶️Answer/Explanation
Ans : D
Question
An aqueous salt solution contains an insoluble impurity.
Which processes are used to obtain pure salt crystals?
(A) distillation then crystallisation
(B) distillation then chromatography
(C) filtration then crystallisation
(D) filtration then chromatography
▶️Answer/Explanation
Ans : C
Question
A sample of water contains two useful substances, insoluble chalk and a soluble salt.
Which two processes are used to individually separate the insoluble chalk from the soluble salt and from the water?
(A) distillation and chromatography
(B) distillation and crystallisation
(C) filtration and chromatography
(D) filtration and crystallisation
▶️Answer/Explanation
Ans: D