DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ2.b.iii
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.sl.TZ2.b.iii |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | b.iii | Adapted from | N/A |
b.iii.
[Maximum mark: 1]
18M.3.sl.TZ2.b.iii
Organic molecules can be visualized using three-dimensional models built from kits such as that pictured below.
Pyridine, like benzene, is an aromatic compound.
Outline what is meant by an aromatic compound.
[1]
Markscheme
bonds within ring have resonance
OR
contains delocalized «conjugated pi» electrons in ring
There must be reference to a ring or cyclic structure.
Accept “alternating single and double bonds in a ring”.
Accept “ring which shows resonance/delocalization”.
Accept “follows Hückel/4n +2 rule”.
Do not accept “contains one or more benzene rings”.
[1 mark]
