DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ1.9c
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.sl.TZ1.9c |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
18M.3.sl.TZ1.9c
Greenhouse gases absorb infrared radiation.
(c)
The concentrations of oxygen and nitrogen in the atmosphere are much greater than those of greenhouse gases. Outline why these gases do not absorb infrared radiation.
[1]
Markscheme
no change in polarity/dipole «moment when molecule vibrates»
Do not accept “non-polar” or “no dipole moment” – idea of change must be there.
[1 mark]
