| Date | May 2009 | Marks available | 1 | Reference code | 09M.3.hl.TZ2.A3 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Predict | Question number | A3 | Adapted from | N/A |
Question
Infrared spectroscopy is an analytical technique that uses electromagnetic radiation.
The infrared spectrum of a substance, X, with empirical formula \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}{\text{O}}\) is given below.
Predict the splitting pattern of the peak with the biggest area.
Markscheme
triplet/\(1:2:1\);
ECF if structure is incorrect.
Examiners report
Generally, once candidates had the structure correct, many had little trouble predicting the splitting pattern.
Syllabus sections
Additional higher level (AHL) » Topic 21: Measurement and analysis » 21.1 Spectroscopic identification of organic compounds
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