Purity and separating mixtures test questions - OCR Gateway

1

Which of these diagrams represents a pure compound?

2

Which is the correct description of these particles?

Diagram of a mixture of elements and compounds.

3

How does filtration work?

4

Which is the best way to obtain a dry sample of salt from a salt solution?

5

Which is the correct order for obtaining salt from a mixture of sand and salt?

6

The difference in which physical property allows mixtures of liquids to be separated by fractional distillation?

7

Which method is used to separate and identify coloured dyes from each other?

8

What will the gas chromatogram of a pure substance show?

9

During thin layer chromatography, the solvent travels 10 cm and a coloured dye travels 4 cm. What is the Rf value of the dye?

10

Where are the spots of dye placed in thin layer chromatography?