DP Chemistry (last assessment 2024)
Question 19M.1.sl.TZ2.11
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.sl.TZ2.11 |
| Level | sl | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 11 | Adapted from | N/A |
11.
[Maximum mark: 1]
19M.1.sl.TZ2.11
Which molecule contains an incomplete octet of electrons?
A. NF3
B. BF3
C. BrF
D. SF2
[1]
Markscheme
B
Examiners report
66 % of the candidates identified BF3 as having an incomplete octet of electrons. The distractors NF3 and BrF were chosen in equal numbers, and the distractor SF2 was chosen by the least number of candidates.