Esters Knowledge-Based Practice

Questions

1. 1.

   Triglycerides, which constitute natural fats and vegetable oils, are triesters formed by the condensation of three fatty acid molecules with which alcohol?

   • A) Ethane-1,2-diol
   • B) Propan-1-ol
   • C) Butane-1,3-diol
   • D) Propane-1,2,3-triol
2. 2.

   What is the systematic IUPAC name of the ester represented by the condensed formula $\text{CH}_3\text{CH}_2\text{COOCH}(\text{CH}_3)_2$?

   • A) ethyl 2-methylpropanoate
   • B) propyl propanoate
   • C) 2-methylpropyl ethanoate
   • D) 1-methylethyl propanoate
3. 3.

   Which statement correctly explains why ethyl ethanoate has a significantly lower boiling point than its structural isomer butanoic acid?

   • A) Ethyl ethanoate cannot form permanent dipole-dipole attractions between its molecules.
   • B) Ethyl ethanoate molecules are held together exclusively by London dispersion forces.
   • C) Ethyl ethanoate has a significantly lower molar mass than butanoic acid.
   • D) Ethyl ethanoate molecules cannot form intermolecular hydrogen bonds with each other.
4. 4.

   Which organic products are formed when methyl ethanoate is heated under reflux with an aqueous solution of sodium hydroxide?

   • A) Sodium methanoate and ethanol
   • B) Ethanoic acid and sodium methoxide
   • C) Ethanoic acid and methanol
   • D) Sodium ethanoate and methanol
5. 5.

   Which pair of reactants produces ethyl methanoate when heated in the presence of a concentrated acid catalyst?

   • A) Ethanoic acid and methanol
   • B) Propanoic acid and ethanol
   • C) Methanoic acid and methanol
   • D) Methanoic acid and ethanol

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