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IB Chemistry HL 3.4.4 Electrophiles Questions

Use real HL exam questions to locate electrophilic centres, identify NO₂⁺ and show how a Lewis-acid electrophile accepts an electron pair.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Identify a positively charged or electron-deficient atom or species as the electrophilic centre that accepts an electron pair.
  • Show the nucleophile donating its electron pair to the electrophile and classify the electrophile as a Lewis acid.

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Study 3.4.4—Electrophiles conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry HL 3.4.4 Electrophiles Questions question 1

[Maximum number: 1]

1-bromopropane undergoes a substitution reaction with potassium cyanide.

Figure for Question IB Chemistry HL 3.4.4 Electrophiles Questions question 1 — IB Chemistry HL

Explain why the substitution occurs on the carbon atom that is marked as *C.

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