Analysing and identifying substances - AQA

1

Which of these images shows a pure compound?

2

Which is the correct description of these particles?

Diagram of a mixture of elements and compounds.

3

A solid was heated gently. It melted at precisely 167°C. Which of these is a true statement about this substance?

4

What is the name of a mixture which has been designed as a useful product?

5

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

6

During paper chromatography to separate different pigments from a mixture, using water as the solvent, what is the stationary phase?

7

How can you tell from a chromatogram how many substances were present in the mixture?

8

Where are the spots of the samples placed in chromatography?

9

A gas is tested with a burning splint and produces a squeaky pop. What gas is it?

10

Which gas causes damp blue litmus paper to turn white?