Nucleophilic substitution in halogenoalkanes Quiz
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5 questions, one answer each
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1. Which is the nucleophile in the reaction CH₃CH₂Br + OH⁻ → CH₃CH₂OH + Br⁻?
- A. CH₃CH₂Br
- B. OH⁻
- C. Br⁻
- D. CH₃CH₂OH
2. Which reagent turns a halogenoalkane into a nitrile?
- A. Aqueous NaOH
- B. Excess NH₃
- C. KCN in ethanol
- D. Aqueous AgNO₃
3. Why does 1-iodobutane react faster than 1-chlorobutane?
- A. The C–I bond is more polar
- B. The C–I bond has a lower bond enthalpy
- C. Iodine is less massive
- D. The C–I bond is shorter
4. What is the organic product of CH₃CH₂CH₂Br with excess ammonia?
- A. CH₃CH₂CH₂OH
- B. CH₃CH₂CH₂CN
- C. CH₃CH₂CH₂NH₂
- D. CH₃CH=CH₂
5. What does the second curly arrow in the mechanism show?
- A. The movement of an electron pair from the C–X bond to X
- B. The nucleophile gaining a proton
- C. The movement of a single electron
- D. The formation of a radical