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CAIE A-Level Chemistry AS 14.2.4 Mechanism Electrophilic Addition in Alkenes Questions

Practise CAIE 9701 electrophilic addition mechanisms for alkenes, including dipoles, curly arrows, intermediates and products.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • show the alkene π bond attacking the electrophile with a correctly oriented curly arrow
  • draw the polarised reagent, carbocation or cyclic intermediate, charges and lone pairs accurately
  • complete nucleophile attack to form the major addition product and name the electrophilic-addition mechanism

CAIE A-Level Chemistry AS 14.2.4 Mechanism Electrophilic Addition in Alkenes Questions question 1

[Maximum number: 1]

Bromine reacts with alkenes by an electrophilic addition mechanism in which a cation is formed as an intermediate.

Which mixture will produce the most stable intermediate cation?

A

3,3-dimethylpent-1-ene + bromine

B

ethene + bromine

C

methylpropene + bromine

D

propene + bromine

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