| Date | May 2016 | Marks available | 2 | Reference code | 16M.3.sl.TZ0.15 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Outline | Question number | 15 | Adapted from | N/A |
Question
Carbon dioxide, CO2, is a greenhouse gas. Outline, in molecular terms, how carbon dioxide molecules absorb infrared radiation.
Markscheme
bond length/C=O changes
OR
«asymmetric» stretching «of bonds»
OR
bond angle/OCO changes/bends
polarity/dipole «moment» changes
OR
a dipole «moment» is created «when the molecule absorbs IR»
Accept appropriate diagrams.
Examiners report
[N/A]
