DP Physics (first assessment 2025)
Question 21M.2.SL.TZ1.3a.ii
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.SL.TZ1.3a.ii |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | a.ii | Adapted from | N/A |
a.ii.
[Maximum mark: 1]
21M.2.SL.TZ1.3a.ii
(a.ii)
State one assumption of the kinetic model of an ideal gas.
[1]
Markscheme
particles can be considered points «without dimensions» ✓
no intermolecular forces/no forces between particles «except during collisions»✓
the volume of a particle is negligible compared to volume of gas ✓
collisions between particles are elastic ✓
time between particle collisions are greater than time of collision ✓
no intermolecular PE/no PE between particles ✓
Accept reference to atoms/molecules for “particle”
