Free Carboxylic Acids MCQs with Answers
550 Carboxylic Acids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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Read the Carboxylic Acids notesFree MDCAT chapter notes with key terms550 questions · page 17 of 28
- A. Non-essential amino acids
- B. Essential amino acids
- C. Dietary amino acids
- D. Synthetic amino acids
Explanation: This is correct. Essential amino acids must be obtained from the diet because the body cannot synthesize them.
Correct answer: Essential amino acids- A. Acetamide
- B. Octyl acetate
- C. Methyl acetate
- D. Acetic anhydride
Explanation: P2O5 is a strong dehydrating agent, and it removes water from acetic acid, forming acetic anhydride.
Correct answer: Acetic anhydride- A. Amyl Acetate
- B. Octyl Acetate
- C. Isobutyl Formate
- D. Ethyl Butyrate
Explanation: Octyl Acetate) - Correct: Known for its orange-like aroma.
Correct answer: Octyl Acetate- A. Ester
- B. Aldehyde
- C. Ketone
- D. Alcohol
Explanation: Ester) - Correct: The reaction produces RCOOR' (ester).
Correct answer: Ester- A. Moderate reaction
- B. Fast reaction
- C. Slow reaction
- D. None of these
Explanation: The esterification reaction is both slow and reversible.
Correct answer: Slow reaction- A. Acid halides
- B. Acid carbonyls
- C. Esters
- D. Acid amides
Explanation: Esters are sweet-smelling so used as flavoring agents.
Correct answer: Esters- A. Benzyl Acetate
- B. Octyl Acetate
- C. Amyl Butyrate
- D. Ethyl Butyrate
Explanation: Reason: Benzyl acetate smells flowery, Amyl butyrate smells like apricot and ethyl butyrate smells like pineapple.
Correct answer: Octyl Acetate- A. Formamide
- B. Acetamide
- C. Benzoic acid
- D. Acetaldehyde
Explanation: Option B is correct since nitriles form carboxylic acids via an amide intermediate.
Correct answer: Acetamide- A. Acetic acid
- B. Butanoic acid
- C. Propanoic acid
- D. Ester
Explanation: Oxidation is the gain of oxygen atoms so when acetaldehyde is oxidized it gains an oxygen atom and the aldehyde converts to the carboxylic…
Correct answer: Acetic acid- A. Acetyl acetate
- B. Vinyl acetate
- C. Chloro acetate
- D. Benzyl acetate
Explanation: PVA is a colorless, usually nontoxic thermoplastic adhesive prepared by the polymerization of vinyl acetate.The rest are not the monomers…
Correct answer: Vinyl acetate- A. Esterification
- B. Salt formation
- C. Reaction with PCl5
- D. Reaction with SOCl2
Explanation: In esterification, a carboxylic acid reacts with an alcohol in the presence of acid to form ester and water.
Correct answer: Esterification- A. A
- B. B
- C. C
- D. D
Explanation: It is esterification reaction in which carboxylic acid and alcohol react to form ester and it is a reversible reaction.Upon hydrolysis of…
Correct answer: C- A. Reduction
- B. Hydrolysis
- C. Dehydration
- D. Oxidation
Explanation: Oxidation is a gain in the number of oxygen or loss in hydrogen.
Correct answer: Oxidation- A. Aniline
- B. Methyl naphthalene
- C. Carboxyl benzene
- D. Benzene sulphonic acid
Explanation: When a carboxyl group is added to a Benzene ring, it is called Benzoic acid.Thus Option C is the right answer.
Correct answer: Carboxyl benzene- A. Acid anhydride
- B. Carboxylate anion
- C. Phenoxide
- D. Protic acid
Explanation: Saponification is a process in which alkaline hydrolysis of esters forms a very important cleansing product and cosmetics.
Correct answer: Carboxylate anion- A. Ethanoyl chloride+SO2+HCl
- B. Ethanoyl chloride+SO3
- C. Ethanoyl chloride+HCl+H2SO3
- D. Ethanoyl chloride+HCl+H2SO4
Explanation: When SOCl2 is reacted with acetic acid, it replaces the -OH group of acetic acid to form an ethanoyl chloride (acyl chloride), sulfur…
Correct answer: Ethanoyl chloride+SO2+HCl- A. Aromatic compounds
- B. Alcohols
- C. Carboxylic acids
- D. Ethers
Explanation: Carboxylic acid is obtained by treating Grignard's reagent with CO2 followed by acid hydrolysis.
Correct answer: Carboxylic acids- A. Alcohols
- B. Aldehydes
- C. Ketones
- D. Ethers
Explanation: Jones reagent is a solution of chromium trioxide (CrO3) in diluted sulfuric acid (H2SO4) that can be used safely for oxidations of organic…
Correct answer: Alcohols- A. Formic acid
- B. Acetic acid
- C. Propionic acid
- D. Nitric acid
Explanation: Carboxylic acid can be prepared from Acetonitrile via hydrolysis to from a carboxylic acid and ammonia.
Correct answer: Acetic acid- A. 1o amide
- B. 2o amide
- C. 3o amide
- D. No reaction
Explanation: The reaction between an acyl chloride and a primary amine (RNH2) results in the formation of a 2o amide and HCl.
Correct answer: 2o amide