A forensic scientist tests a white powder found in an unlabelled container. The container is thought to hold compound P.
The results are shown in the table.
| Accepted melting point of pure compound P in ∘C^\circ\text{C}∘C | Temperature at which the powder began to melt in ∘C^\circ\text{C}∘C | Temperature at which the powder had completely melted in ∘C^\circ\text{C}∘C |
|---|---|---|
| 122 | 116 | 120 |
The scientist claims that the powder is pure compound P.
Evaluate the scientist's claim.
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.