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IB Chemistry SL 3.4.4 Electrophiles Question Bank

Practise IB Chemistry SL 3.4.4 with questions identifying electrophiles and their acceptance of donated electron pairs.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • locate a positively charged or electron-deficient atom able to accept an electron pair
  • show bond formation by directing the nucleophile's pair towards the electrophilic centre
  • classify an electrophile as a Lewis acid while separating it from nucleophilic species

3.4.4—Electrophiles question 1

[Maximum number: 1]

Which species is the electrophile?

CH3Br+OH−→CH3OH+Br−\mathrm{CH}_{3} \mathrm{Br}+\mathrm{OH}^{-} \rightarrow \mathrm{CH}_{3} \mathrm{OH}+\mathrm{Br}^{-}
A

OH−\mathrm{OH}^{-}

B

Br−\mathrm{Br}^{-} c. CH3OH\mathrm{CH}_{3} \mathrm{OH} D. CH3Br\mathrm{CH}_{3} \mathrm{Br}

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