A student uses mass spectrometry to identify an unknown alcohol. The table shows the main peaks for the unknown alcohol and reference data for four alcohols.
| Substance | Mass-to-charge ratios of main peaks |
|---|---|
| Methanol | 15, 29, 31, 32 |
| Ethanol | 15, 29, 31, 45, 46 |
| Propan-1-ol | 29, 31, 42, 59, 60 |
| Butan-1-ol | 31, 41, 43, 56, 74 |
| Unknown alcohol | 15, 29, 31, 45, 46 |
Which alcohol is the unknown alcohol?
Ethanol
Methanol
Propan-1-ol
Butan-1-ol
52 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.