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10 Carboxylic Acids and Their Derivatives Online Quiz Questions

Use this free practice quiz with 20 questions to review 10 Carboxylic Acids and Their Derivatives, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

What is the correct name for the ester CH₃CH₂COOCH₃?

  1. A

    methyl propanoate

  2. B

    propyl methanoate

  3. C

    methyl butanoate

  4. D

    ethyl propanoate

02
True or false
1 point

In nucleophilic acyl substitution, the tetrahedral intermediate can collapse to reform the carbonyl and expel a leaving group.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

What is the name of the acid chloride derived from butanoic acid?

04
Choose one
1 point

Which statement best describes the general relative reactivity of thioesters and ordinary esters toward nucleophilic acyl substitution?

  1. A

    Ordinary esters are always more reactive than thioesters.

  2. B

    Thioesters and ordinary esters have identical reactivity under all conditions.

  3. C

    Thioesters are generally more reactive than ordinary esters.

  4. D

    Thioesters are less reactive than carboxylates.

05
Written response
1 point

During nucleophilic acyl substitution, what is the name of the intermediate formed immediately after nucleophilic attack on the carbonyl carbon?

06
Choose all
1 point

Select all statements that help explain why amides are generally less reactive than acid chlorides in nucleophilic acyl substitution.

  1. A

    Weaker bases are generally better leaving groups.

  2. B

    Stronger resonance donation into a carbonyl always makes its carbon more electrophilic.

  3. C

    Nitrogen resonance donation can reduce the electrophilicity of the carbonyl carbon.

  4. D

    Leaving-group ability has no influence on the reactivity trend.

07
True or false
1 point

Carboxylates are generally more reactive toward nucleophilic acyl substitution than amides.

  1. A

    True

  2. B

    False

08
Fill in the blank
1 point

Complete the products of basic ester hydrolysis: RCOOR′ + OH⁻ → + .

09
Written response
1 point

What is the name of the equilibrium process in which a carboxylic acid reacts with an alcohol under acid catalysis to form an ester and water?

10
Choose all
1 point

Select all transformations supported by the reaction network for carboxylic acid derivatives.

  1. A

    A carboxylic acid can be converted to an acid chloride using SOCl₂.

  2. B

    An acid chloride can react with a carboxylate ion to form an anhydride.

  3. C

    A stable amide can be converted directly to an acid chloride by simple nucleophilic substitution.

  4. D

    An acid chloride can react with an amine to form an amide.

11
Choose one
1 point

Which sequence is a suitable route for preparing ethyl butanoate from butanoic acid using the derivative transformations described?

  1. A

    React butanoic acid with ethanol alone, then treat the mixture with SOCl₂.

  2. B

    Treat butanoic acid with SOCl₂, then react the resulting acid chloride with ethanol in the presence of a base.

  3. C

    Treat butanoic acid with ammonia, then react the resulting amide with ethanol.

  4. D

    Hydrolyze butanoic acid with aqueous base, then add ethanol.

12
Choose one
1 point

What is the correct name for a carboxylic acid whose carboxyl group is attached to a cyclohexane ring, with the carboxyl carbon outside the ring?

  1. A

    cyclohexanoic acid

  2. B

    cyclohexanoyl acid

  3. C

    cyclohexanone acid

  4. D

    cyclohexanecarboxylic acid

13
Open ended
1 point

A chemist wants to convert a stable amide into an acid chloride. Explain why simple nucleophilic acyl substitution is not a suitable direct route, and outline a reasonable sequence of transformations to reach the acid chloride.

14
True or false
1 point

A cyclic ester is called a lactone, and a cyclic amide is called a lactam.

  1. A

    True

  2. B

    False

15
Written response
1 point

A derivative has an amide group incorporated into a ring. What class name describes this cyclic amide?

16
Written response
1 point

A carboxylate ion replaces chloride on an acid chloride in an acyl substitution. What derivative class is formed?

17
Choose one
1 point

During the nucleophile's attack on the carbonyl carbon in nucleophilic acyl substitution, where do the carbonyl π electrons move?

  1. A

    The leaving group departs before the nucleophile attacks.

  2. B

    The carbonyl π electrons move onto oxygen.

  3. C

    The carbonyl oxygen attacks the nucleophile to form a planar intermediate.

  4. D

    The carbonyl carbon loses its attached substituent without forming an intermediate.

18
Choose one
1 point

Why are amides generally less reactive than esters toward nucleophilic acyl substitution?

  1. A

    Nitrogen donates electron density into the carbonyl by resonance.

  2. B

    The carbonyl carbon in an amides is negatively charged.

  3. C

    Amides lack a carbonyl group.

  4. D

    Nitrogen makes the carbonyl carbon more electrophilic by withdrawing electron density through resonance.

19
Choose one
1 point

Which sequence can convert butanoic acid into ethyl butanoate using the reagents and conditions described in the material?

  1. A

    Treat butanoic acid with ethanol and then SOCl₂.

  2. B

    React butanoic acid directly with ethanol under basic conditions.

  3. C

    Treat butanoic acid with SOCl₂, then react the acid chloride with ethanol, typically using a base.

  4. D

    Hydrolyze butanoic acid with aqueous base, then add ethanol.

20
Choose one
1 point

How does the typical reactivity of a thioester compare with that of an ordinary ester in nucleophilic acyl substitution?

  1. A

    Less reactive than ordinary esters

  2. B

    More reactive than ordinary esters

  3. C

    Equal in reactivity to ordinary esters under all conditions

  4. D

    Unreactive toward nucleophilic acyl substitution