DP Chemistry (first assessment 2025)
Question EXM.1A.HL.TZ0.8
| Date | May Example question | Marks available | [Maximum mark: 1] | Reference code | EXM.1A.HL.TZ0.8 |
| Level | HL | Paper | 1A | Time zone | TZ0 |
| Command term | Question number | 8 | Adapted from | N/A |
8.
[Maximum mark: 1]
EXM.1A.HL.TZ0.8
Which is correct when benzene undergoes electrophilic substitution by chlorine, Cl2, in presence of the catalyst, Cl3Al?
A. C6H6 + Cl2 → C6H5Cl + HCl
B. C6H6 + Cl2 → C6H4Cl2 + H2
C. C6H6 + Cl2 → C6H6Cl2
D. C6H6 + Cl2 → C6H6Cl + Cl−
[1]
Markscheme
A
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.4—Electron-pair sharing reactions » Reactivity 3.4.13—Electrophilic substitution reactions include the reactions of benzene with electrophiles. Describe and explain the mechanism of the reaction between benzene and a charged electrophile, E+.