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 14 of 28
- A. A
- B. B
- C. C
- D. D
Explanation: Glutamic acid is HOOC−CH(NH2)−(CH2)2−COOH.
Correct answer: B- A. Amino acid
- B. Fatty acid
- C. Saccharide
- D. Amide
Explanation: An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R…
Correct answer: Amino acid263. Alanine is an aminoacid which showsneutral effect on litmus paper,the formula of alanine may be
- A. A
- B. B
- C. C
- D. D
Explanation: Alanine is a non-polar, aliphatic, and alpha-amino acid that contains both an amine (-NH2) and a carboxyl (-COOH) group attached to the…
Correct answer: A- A. A
- B. B
- C. C
- D. D
Explanation: An amino acid is a molecule containing both amine and carboxyl functional groups. Amino acids are the building blocks of proteins.
Correct answer: B- A. Carboxylic acid > Alcohol > Phenol > Water CH3
- B. Carboxylic acid > Phenol > Water > Alcohol
- C. Phenol > Carboxylic acid > Alcohol > Water
- D. Water > Alcohol > Phenol > Carboxylic acid
Explanation: The acidity of a molecule depends on the stability of its ions after releasing the H+, the more stable the negative ion is the more acidic…
Correct answer: Carboxylic acid > Phenol > Water > Alcohol- A. CH3COCl + POCl3 + HCl
- B. CH3COCl + POCl2 + HCl
- C. CH3Cl + POCl3 + HCl
- D. CH3COCl + POCl3 + H2
Explanation: The reaction of a carboxylic acid (acetic acid in this case) and PCl5 produces an acyl chloride (CH3COCl in this case) along with POCl3…
Correct answer: CH3COCl + POCl3 + HCl- A. Magnesium formate
- B. Magnesium acetate
- C. Magnesium ion
- D. Carboxylate ion
Explanation: Carboxylic acids react with active metals to form hydrogen and metal carboxylates, without changing the carbon chain.
Correct answer: Magnesium acetate- A. Pear
- B. Banana
- C. Pineapple
- D. Apple
Explanation: Ethyl butyrate and butyl butanoate are esters with the flavour of pineapple.It is a fact and should be memorized.
Correct answer: Pineapple- A. Oxalic acid
- B. Ethanoic acid
- C. Butanoic acid
- D. Propanoic acid
Explanation: Acetamide is a two carbon amide so when it is reduced it will turn into a two-carbon carboxylic acid,ethanoic acid.
Correct answer: Ethanoic acid- A. Carboxylic Acid > Phenol > Ethanol > Water
- B. Carboxylic Acid > Phenol > Water > Ethanol
- C. Phenol > Carboxylic Acid > Ethanol > Water
- D. Water > Ethanol > Phenol > Carboxylic Acid
Explanation: The phenoxide ion obtained after the removal of a proton is stabilized by resonance whereas the ethoxide loan obtained after the removal…
Correct answer: Carboxylic Acid > Phenol > Water > Ethanol- A. Nucleophilic substitution reaction
- B. Nucleophilic addition reaction
- C. Electrophilic substitution reaction
- D. Electrophilic addition reaction
Explanation: Carboxylic acids react with alcohols in presence of acid as catalyst and form esters (esterification).
Correct answer: Nucleophilic substitution reaction- A. Acetic acid
- B. Formic acid
- C. Propanoic acid
- D. Butanoic acid
Explanation: In the presence of an acid, hydrolysis of nitriles like methyl cyanide gives carboxylic acids.
Correct answer: Acetic acid- A. Aspartic Acid
- B. Asparagine
- C. Adipic Acid
- D. Glutamic Acid
Explanation: KEY POINTS GIVEN STRUCTURE HAS 5 CARBONSGIVEN STRUCTURE IS AN AMINO ACID SO IT ELIMINATES THE CHANCES OF OPTION CGlutamic acid has formula…
Correct answer: Glutamic Acid- A. HNO3
- B. H2SO4
- C. Acidified potassium dichromate
- D. SOCl2
Explanation: In this reaction, Ester is being formed. Esters are produced when carboxylic acids are heated with alcohols in the presence of an acid…
Correct answer: H2SO4- A. Esterification
- B. Reaction with PCI5
- C. Salt formation
- D. Reaction with SOCl2
Explanation: Among the options given, the only reversible reaction involving carboxylic acids is A) Esterification, where carboxylic acids and alcohols…
Correct answer: Esterification- A. Carboxylic acid
- B. Aldehyde
- C. Ketone
- D. Alcohol
Explanation: Catalytic oxidation of alkanes always results in the formation of alcohols.
Correct answer: Alcohol- A. CH3COCl
- B. CH3COCl2
- C. CH3COCH2Cl2
- D. CH2COCl2
Explanation: Here's the reaction mechanism. In the given reaction: CH3COOH + PCl5 → X + POCl3 + HCl The product X is acetyl chloride (CH3COCl).
Correct answer: CH3COCl- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The carboxyl functional group that characterizes the carboxylic acids is unusual in that it is composed of two functional groups: (1) the…
Correct answer: Option D- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The general form of a rate law is: Rate =k[A]x[B]y1. Find the effect of changing [A] (Order with respect to A):Compare Experiment 1 and…
Correct answer: Option A- A. Alcohol
- B. Carboxylic acid
- C. Amines
- D. Amides
Explanation: Nitrile gets hydrolyzed in two steps; amides are formed first. While in the second step, an ammonium salt of a carboxylic acid is formed.
Correct answer: Carboxylic acid