DP Chemistry (last assessment 2024)
Question 19M.2.hl.TZ2.d(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.hl.TZ2.d(i) |
| Level | hl | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | d(i) | Adapted from | N/A |
d(i).
[Maximum mark: 1]
19M.2.hl.TZ2.d(i)
Dinitrogen monoxide, N2O, causes depletion of ozone in the stratosphere.
The Lewis (electron dot) structure of the dinitrogen monoxide molecule can be represented as:
State what the presence of alternative Lewis structures shows about the nature of the bonding in the molecule.
[1]
Markscheme
delocalization
OR
delocalized π-electrons [✔]
Note: Accept “resonance”.
Examiners report
Most candidates identified resonance for this given Lewis representation.
