DP Chemistry (last assessment 2024)
Question 19M.1.hl.TZ2.33
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.hl.TZ2.33 |
| Level | hl | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 33 | Adapted from | N/A |
33.
[Maximum mark: 1]
19M.1.hl.TZ2.33
Methane reacts with chlorine in sunlight.
CH4 (g) + Cl2 (g) → CH3Cl (g) + HCl (g)
Which type of reaction occurs?
A. free-radical substitution
B. electrophilic substitution
C. nucleophilic substitution
D. electrophilic addition
[1]
Markscheme
A
Examiners report
85 % of the candidates chose free-radical substitution as the type of reaction occurring between methane and chlorine in sunlight.