DP Chemistry (last assessment 2024)
Question 17N.3.sl.TZ0.10a
| Date | November 2017 | Marks available | [Maximum mark: 2] | Reference code | 17N.3.sl.TZ0.10a |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
17N.3.sl.TZ0.10a
Vitamins can be water-soluble or fat-soluble.
(a)
Explain, at the molecular level, why vitamin D is soluble in fats. Use section 35 of the data booklet.
[2]
Markscheme
«mainly» hydrocarbon/non-polar «structure»
forms London/dispersion/instantaneous induced dipole-induced dipole forces «with fats»
Accept “forms van der Waals’/vdW forces”.
Award [1 max] for “contains only one OH/hydroxyl AND cannot form «enough» H-bonds”.
