The accepted boiling point of liquid compound K is 96 ∘C96\ ^\circ\text{C}96 ∘C.
Four samples labelled K were heated under the same conditions.
| Sample | Boiling result |
|---|---|
| A | Boiled sharply at 96 ∘C96\ ^\circ\text{C}96 ∘C |
| B | Boiled sharply at 101 ∘C101\ ^\circ\text{C}101 ∘C |
| C | Boiled between 94 ∘C94\ ^\circ\text{C}94 ∘C and 98 ∘C98\ ^\circ\text{C}98 ∘C |
| D | Boiled between 96 ∘C96\ ^\circ\text{C}96 ∘C and 99 ∘C99\ ^\circ\text{C}99 ∘C |
Which result supports the conclusion that the sample is pure?
The result for sample A
The result for sample B
The result for sample C
The result for sample D
113 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.