DP Chemistry (first assessment 2025)
Question 19M.1A.HL.TZ1.40
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1A.HL.TZ1.40 |
| Level | HL | Paper | 1A | Time zone | TZ1 |
| Command term | Question number | 40 | Adapted from | N/A |
40.
[Maximum mark: 1]
19M.1A.HL.TZ1.40
Which can be identified using infrared (IR) spectroscopy?
A. functional groups
B. molar mass
C. 3-D configuration
D. bond angle
[1]
Markscheme
A
Examiners report
The vast majority of candidates knew that IR spectroscopy can be used to identify functional groups.
Syllabus sections
Structure 3. Classification of matter » Structure 3.2—Functional groups: Classification of organic compounds » Structure 3.2.9—Infrared (IR) spectra can be used to identify the type of bond present in a molecule. Interpret the functional group region of an IR spectrum, using a table of characteristic frequencies (wavenumber/cm–1).