DP Chemistry (first assessment 2025)

Test builder »

Question 20N.1A.HL.TZ0.35

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.1A.HL.TZ0.35
Level	HL	Paper	1A	Time zone	TZ0
Command term	State	Question number	35	Adapted from	N/A

35.

[Maximum mark: 1]

20N.1A.HL.TZ0.35

Which is the electrophile in the nitration of benzene?

A. ${HNO}_{3}$

B. ${NO}_{2}^{+}$

C. ${NO}_{2}^{-}$

D. ${NH}_{4}^{+}$

[1]

Markscheme

B

Examiners report

The vast majority selected the nitronium ion as the electrophile in the nitration of benzene.

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+.