Amines Knowledge-Based Practice

Questions

1. 1.

   What is the systematic IUPAC name of the compound with the structural formula $\text{CH}_3\text{CH}_2\text{CH}(\text{NH}_2)\text{CH}_3$?

   • A) Butan-2-amine
   • B) Butan-1-amine
   • C) 2-Methylpropan-1-amine
   • D) 1-Methylpropan-1-amine
2. 2.

   When ethylamine reacts with hydrochloric acid in an aqueous solution, which of the following products is formed?

   • A) Chloroethane
   • B) Ethylammonium chloride
   • C) Ethanamide
   • D) Diethylamine
3. 3.

   Among the constitutional isomers of molecular formula $\text{C}_3\text{H}_9\text{N}$, which compound has the lowest boiling point because it cannot form intermolecular hydrogen bonds with its own molecules?

   • A) Trimethylamine
   • B) 1-Propanamine
   • C) 2-Propanamine
   • D) N-Methylethanamine
4. 4.

   Which of the following structural features is primarily responsible for the basic behavior of amines in chemical reactions?

   • A) The presence of a nonbonding lone pair of electrons on the nitrogen atom
   • B) The delocalization of electron density into carbon-hydrogen bonds through resonance
   • C) The high acidity of the hydrogen atoms bonded directly to the nitrogen atom
   • D) The trigonal planar geometry resulting from $sp^2$ hybridization of nitrogen
5. 5.

   Which of the following compounds is classified as a secondary ($2^\circ$) amine?

   • A) Ethanamine
   • B) N-Methylethanamine
   • C) 2-Methylpropan-2-amine
   • D) N,N-Dimethylethanamine

Answers and step-by-step solutions appear after you finish the test.