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Fundamental Principles of Organic Chemistry MCQs for MDCAT Practice

Chemistry section, Fundamental Principles of Organic Chemistry 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 1,059 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    the number of asymmetric carbon atoms in tartaric acid is
    • 1
    • 4
    • 2
    • 0 (correct answer)
    Correct answer: D
    Tartaric acid has no asymmetric carbon atoms due to internal symmetry, despite having chiral centers.
  2. Question 2
    Which of the following is the most stable carbocation:
    • Secondary
    • Primary
    • Teritary (correct answer)
    • All have same stability
    Correct answer: C
    Carbocation stability increases with alkyl substitution due to inductive effects and hyperconjugation, making tertiary carbocations the most stable.
  3. Question 3
    Among the following, which one is nucleophile:
    • H+
    • OH- (correct answer)
    • Ca2+
    • Na+
    Correct answer: B
    A nucleophile is an electron-rich species that donates an electron pair to an electron-deficient atom, forming a new covalent bond. Option B, OH-, fits this definition due to its negative charge and lone pairs.
  4. Question 4
    Which is an electrophile?
    • H2O
    • SO3 (correct answer)
    • NH3
    • ROR
    Correct answer: B
    Identify electrophiles by recognizing electron-deficient species that seek electrons, often due to electronegativity or incomplete octets.
  5. Question 5
    Organic compounds can be classified even based upon the function groups. Identify the one which is not a functional group?
    • Isocyanide (correct answer)
    • Isocyano
    • Carboxyl
    • Carbonyl
    Correct answer: A
    Distinguish between true functional groups and other organic nomenclature terms. Functional groups are specific arrangements of atoms that dictate chemical reactivity.
  6. Question 6
    What is the common name for 2-propanol?
    • Isopropyl alcohol (correct answer)
    • Ethylene glycol
    • Propylene glycol
    • Methyl ethyl ketone
    Correct answer: A
    2-propanol, a secondary alcohol with three carbon atoms, is also known by its common name, isopropyl alcohol.
  7. Question 7
    Which of the following molecules from the FSc syllabus exhibits geometric isomerism but NOT optical isomerism?
    • 2-Butene (correct answer)
    • Lactic Acid
    • Tartaric Acid
    • 2-Chlorobutane
    Correct answer: A
    Distinguishing between geometric and optical isomerism is key. This question tests identifying molecules with restricted rotation (geometric) but lacking a chiral center (optical).
  8. Question 8
    The correct name of H2C = CH − CH2 − CH2 − OH is:
    • 1-butene-4-ol
    • 2-butene-1-ol
    • 3-butene-1-ol (correct answer)
    • None of these
    Correct answer: C
    Correctly naming alkenols requires prioritizing the functional group with the lowest possible number and numbering the longest carbon chain accordingly.

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