3.3.11 Amines (A-level only)

Aqueous solutions of ammonia, ethylamine and phenylamine are prepared. Each solution has the same concentration.

Which is the correct order for the pH values of these solutions?

• ammonia > ethylamine > phenylamine

• ammonia > phenylamine > ethylamine

• ethylamine > ammonia > phenylamine

• ethylamine > phenylamine > ammonia

Which compound is the strongest base?

• Ammonia

• Ammonium chloride

• Methylamine

• Phenylamine

Which one of the following reactions does not involve donation of an electron pair?

• H⁺ + CH₃NH₂ → CH₃NH₃⁺

• AlCl₃ + Cl⁻ → AlCl₄^-

• CH₃Cl + CN⁻ → CH₃CN + Cl⁻

• 0.5Cl₂ + I⁻ → Cl⁻ + 0.5I₂

This question is about the following reaction scheme which shows the preparation of polymer P.

Polymer P is formed in a two-step reaction from N. The first stage is a neutralisation reaction. The volume, in cm³, of a 0.20 mol dm⁻³ solution of H₂NCH₂CH₂NH₂ required to neutralise 6.8 × 10⁻³ mol of the acid N is

• 17

• 34

• 68

• 136

What type of reaction is used to convert (CH₃)₃N into the cationic surfactant [(CH₃)₃N(CH₂)₁₅CH₃]Cl?

• Bronsted–Lowry acid-base reaction

• Nucleophilic addition

• Nucleophilic addition-elimination

• Nucleophilic substitution