Aldehydes and ketones Knowledge-Based Download PDF

Questions

1. 1.

   Which type of organic compound is formed when an aldehyde reacts with one molar equivalent of an alcohol in the presence of an acid catalyst?

   • A) An acetal
   • B) A hemiacetal
   • C) An ester
   • D) An ether
2. 2.

   Which of the following compounds is a functional group isomer of butanal?

   • A) Butan-1-ol
   • B) Butanoic acid
   • C) Butan-2-one
   • D) Diethyl ether
3. 3.

   Which of the following carbonyl compounds is the most reactive toward nucleophilic addition reactions?

   • A) Propan-2-one
   • B) Butan-2-one
   • C) Pentan-3-one
   • D) Methanal
4. 4.

   Which of the following carbonyl compounds produces a secondary alcohol upon complete reduction with sodium borohydride ($\text{NaBH}_4$)?

   • A) Methanal
   • B) Ethanal
   • C) Butanal
   • D) Propanone
5. 5.

   Which of the following compounds produces a silver mirror when treated with Tollens' reagent?

   • A) Propanal
   • B) Propan-2-one
   • C) Pentan-3-one
   • D) Acetophenone