Esters Knowledge-Based Download PDF

Questions

1. 1.

   Which of the following compounds is a functional group isomer of ethyl methanoate?

   • A) Ethanoic acid
   • B) Propanoic acid
   • C) Methyl ethanoate
   • D) Propanal
2. 2.

   Which products are obtained when ethyl ethanoate is heated under reflux with aqueous sodium hydroxide?

   • A) Ethanoic acid and ethanol
   • B) Sodium ethanoate and ethanal
   • C) Sodium ethanoate and ethanol
   • D) Sodium propanoate and methanol
3. 3.

   Which of the following best explains why esters have significantly lower boiling points than isomeric carboxylic acids of similar molar mass?

   • A) Esters contain nonpolar carbonyl groups that interact exclusively through London dispersion forces.
   • B) Esters possess an unstable carbon-oxygen linkage that undergoes spontaneous thermal decomposition at low temperatures.
   • C) Esters cannot participate in dipole-dipole interactions because of their completely symmetrical molecular geometry.
   • D) Esters lack a hydrogen atom bonded directly to an oxygen atom, preventing intermolecular hydrogen bonding between ester molecules.
4. 4.

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

   • A) Ethyl ethanoate
   • B) Methyl propanoate
   • C) Propyl methanoate
   • D) Methyl butanoate
5. 5.

   Which carboxylic acid and alcohol undergo an acid-catalyzed condensation reaction to form ethyl butanoate?

   • A) Ethanoic acid and butan-1-ol
   • B) Butanoic acid and ethanol
   • C) Propanoic acid and propan-1-ol
   • D) Butanoic acid and methanol