DP Chemistry (last assessment 2024)
Question 19M.1.hl.TZ2.12
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.hl.TZ2.12 |
| Level | hl | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 12 | Adapted from | N/A |
12.
[Maximum mark: 1]
19M.1.hl.TZ2.12
How many sigma (σ) and pi (π) bonds are present in hydrogen cyanide, HCN?
[1]
Markscheme
B
Examiners report
89 % of the candidates deduced the numbers of sigma and pi bonds in HCN correctly. The most commonly chosen distractor (C) had the correct number of sigma bonds but only one pi bond.