Skip to main content

Carboxylic Acids MCQs for MDCAT Practice

Chemistry section, Carboxylic Acids chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 869 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    Which of the following formulae is the correct general formula of aliphatic carboxylic acid?
    • RCOOH (correct answer)
    • ArCOOH
    • PhCOOH
    • None of these options are correct
    Correct answer: A
    Distinguishes between general formulas for aliphatic and aromatic carboxylic acids, emphasizing the 'R' group's role.
  2. Question 2
    The O-H bond of carboxylic acid breaks when product is:
    • Salt (correct answer)
    • Acid chloride
    • Ester
    • Amide
    Correct answer: A
    Carboxylic acid O-H bond cleavage occurs during salt formation via deprotonation, distinguishing it from reactions forming acid chlorides, esters, or amides.
  3. Question 3
    The characteristic group of the organic ester is
    • CO
    • OOH
    • CHO
    • COO (correct answer)
    Correct answer: D
    Identify the defining functional group of organic esters, distinguishing it from other carbonyl-containing compounds.
  4. Question 4
    Maleic acid is stronger than fumaric acid because :
    • Fumaric acid shows intermolecular H-bonding
    • Fumaric acid shows intramolecular H-bonding
    • Maleic acid is dibasic acid
    • Maleic acid shows chelation or intramolecular H-bonding (correct answer)
    Correct answer: D
    Maleic acid's enhanced acidity stems from intramolecular H-bonding, stabilizing its conjugate base, unlike fumaric acid's intermolecular interactions.
  5. Question 5
    The product X in the given reaction is
    Diagram for this question, with no written description.
    • CH3–CO–CH3
    • CH3–CH2–CHO
    • CH3–CH2–CH2–OH
    • CH3–CH2–COOH (correct answer)
    Correct answer: D
    Oxidation of primary alcohols yields carboxylic acids via aldehydes. This reaction tests understanding of alcohol oxidation states and product predictability.
  6. Question 6
    The product of decarboxylation of sodium salt of carboxylic acid is
    • Alcohol
    • Alkane (correct answer)
    • Aldehyde
    • Ketone
    Correct answer: B
    Decarboxylation of sodium carboxylates, typically via Kolbe's electrolysis or dry distillation, yields alkanes by releasing CO2.
  7. Question 7
    Which of the following produce Carbon Dioxide with sodium bicarbonate?
    • CH3COOCH3
    • CH3CH2OH
    • CH3CH2COOH (correct answer)
    • CH3COOOCH3
    Correct answer: C
    Carboxylic acids are acidic enough to react with sodium bicarbonate, releasing CO2 gas, unlike esters, alcohols, or their salts.
  8. Question 8
    Which one of the following is not a fatty acid:
    • Oleic acid
    • Stearic acid
    • Phtalic acid (correct answer)
    • Butanoic acid
    Correct answer: C
    This question tests your understanding of the defining structural characteristics of fatty acids, specifically the presence of a long hydrocarbon chain and a carboxyl group.

Practise all 869 Carboxylic Acids questions

A free account keeps your correct, incorrect and unseen questions separate, and shows the explanation after every attempt.

Create a free account

Read the full Carboxylic Acids chapter notes: Carboxylic Acids notes. Or browse every chapter.