DP Chemistry (last assessment 2024)
Question 19M.1.sl.TZ1.26
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.sl.TZ1.26 |
| Level | sl | Paper | 1 | Time zone | TZ1 |
| Command term | Question number | 26 | Adapted from | N/A |
26.
[Maximum mark: 1]
19M.1.sl.TZ1.26
What is the mechanism of the reaction between alkenes and halogens in the absence of light?
A. radical substitution
B. electrophilic substitution
C. electrophilic addition
D. nucleophilic substitution
[1]
Markscheme
C
Examiners report
Only 33 % of candidates could identify the mechanism type with a large confusion between electrophilic addition and substitution.