R3.4 Electron-pair sharing reactions Quiz
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5 questions, one answer each
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1. Which species is a nucleophile?
- A. H⁺
- B. CN⁻
- C. Br₂
- D. Na⁺
2. Which is formed by heterolytic fission of Cl₂?
- A. 2Cl•
- B. Cl⁺ and Cl⁻
- C. Cl₂⁺ and e⁻
- D. 2Cl⁻
3. What is the organic product of ethene with hydrogen bromide?
- A. 1,2-dibromoethane
- B. bromoethane
- C. ethanol
- D. bromoethene
4. In CH₃Cl + OH⁻ → CH₃OH + Cl⁻, what is the leaving group?
- A. OH⁻
- B. CH₃⁺
- C. Cl⁻
- D. H₂O
5. Why does bromine act as an electrophile towards alkenes?
- A. It has a permanent dipole
- B. It is negatively charged
- C. The electron-rich C=C induces a dipole in Br₂, making the nearer Br atom δ+
- D. It donates a lone pair to the alkene