NivaarExam PrepOfficial exam papers ↗

04-BS-12: May 2018

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Cocaine vs. Cocaine Hydrochloride — Boiling Point and Solubility
  2. Question 2 Cholic Acid → Bile Salt — Amphiphilic Lipid Transport
  3. Question 3 Benzene Metabolism — Arene Oxide and Phenol
  4. Question 4 Four Isomeric Dimethylcyclopropanes — Isomerism, Chirality, Physical Properties
  5. Question 5 Reaction-Energy Diagrams
  6. Question 6 Intermolecular vs. Intramolecular Esterification — Why K eq Differs
  7. Question 7 Stereochemistry Across Three Reaction Branches from One Alcohol
  8. Question 8 Stepwise Synthesis of Propranolol
  9. Question 9 Five Syntheses from Cyclohexene
  10. Question 10 Mass Spectrometry, IR, and NMR Structure Elucidation
  11. Question 11 Polymer Monomer Identification
  12. Question 12 Curcumin — Keto–Enol Tautomerism, Acidity, Colour, Antioxidant Activity
  13. Question 13 Polyester/Polyamide Monomer–Polymer Identification

Start with Question 1 →

National Exam 04-BS-12, Organic Chemistry — May 2018. 3 hours, closed-book examination (one Casio/Sharp-approved calculator and one hand-written aid sheet permitted); NOTES on page 1 state that TEN (10) questions constitute a complete exam paper and only the first 10 as they appear in the answer book are marked, but this sitting prints 13 numbered questions — every question and sub-part below is answered in full.

Reference texts: McMurry, Organic Chemistry, 9th ed. (drug acid–base/salt pharmacokinetics, steroid/bile-acid amphiphilicity, arene-oxide metabolism, cyclopropane stereochemistry and CIP assignment, reaction-energy diagrams, ester equilibria and intramolecular effective molarity, SN2 stereochemistry at a common stereocentre, named-drug synthesis design, epoxide ring-opening stereochemistry, mass-spectral formula discrimination, opioid IR/NMR structure elucidation, keto–enol tautomerism and conjugation/acidity, and condensation-polymer monomer identification). Every molecular formula, mass-balance, exact-mass, and stereochemical (R/S) assignment below.