Chemistry - Aldehydes, Ketones, and Carboxylic Acids - MCQs
Explore the chemistry of aldehydes, ketones, and carboxylic acids and their reactions in organic chemistry.
What is the outcome when carboxylic acids react with alcohols in the presence of an acid catalyst?
A. Esterification
B. Decarboxylation
C. Hydrolysis
D. Oxidation
Answer: Esterification
What is the primary characteristic of aldehydes?
A. They are less reactive than ketones.
B. They have a carbonyl group at the end of the carbon chain.
C. They cannot participate in nucleophilic addition.
D. They cannot be oxidized.
Answer: They have a carbonyl group at the end of the carbon chain.
Which reagent is used in the iodoform test?
A. Iodine and sodium hydroxide
B. Bromine and water
C. Fehling's solution
D. Tollens' reagent
Answer: Iodine and sodium hydroxide
What is the main method for the synthesis of carboxylic acids?
A. Hydrolysis of esters
B. Oxidation of aldehydes
C. Decarboxylation of salts
D. All of the above
Answer: All of the above
Which of the following is a known reducing agent?
A. H2O2
B. KMnO4
C. LiAlH4
D. HCl
Answer: LiAlH4
What is the expected product when propanoic acid reacts with sodium bicarbonate?
A. Sodium propanoate, water, and carbon dioxide
B. Sodium propanoate and water
C. Propanoic acid and sodium hydroxide
D. Sodium carbonate
Answer: Sodium propanoate, water, and carbon dioxide
What type of isomerism is exhibited by butanal and 2-methylpropanal?
A. Geometric isomerism
B. Structural isomerism
C. Optical isomerism
D. Functional group isomerism
Answer: Functional group isomerism
What is the effect of branching in carboxylic acids on their boiling point?
A. Increases boiling point
B. Decreases boiling point
C. No effect
D. Increases then decreases
Answer: Decreases boiling point
Which of the following is a possible product of the oxidation of a secondary alcohol?
A. Aldehyde
B. Carboxylic acid
C. Ketone
D. Alcohol
Answer: Ketone
What is the main type of reaction involving aldehydes in organic synthesis?
A. Nucleophilic addition
B. Elimination
C. Substitution
D. Polymerization
Answer: Nucleophilic addition