Chemistry PC (Eng. Prep year 2) Revision Sheets
Chemistry in PC is this path's identity: 6-8h/week, heavy concours coefficient (~15-20% of total), with significant organic chemistry portion (absent from MP). The path for future chemical, pharmaceutical, food engineers.
Chemistry curriculum in PC (Eng. Prep year 2)
The curriculum covers advanced organic chemistry (reaction mechanisms, stereochemistry, multi-step synthesis: Diels-Alder, Wittig, Grignard), chemical thermodynamics (equilibria, equilibrium displacement, electrochemistry: cells, electrolysis, Pourbaix diagrams), chemical kinetics (catalysis, complex mechanisms, activated complex theory), and materials chemistry (crystal solids, defects, polymers).
How to study chemistry in PC (Eng. Prep year 2)?
3 simple steps for effective chemistry revision.
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Tips to succeed in chemistry PC (Eng. Prep year 2)
Organic chemistry requires LOTS of practice: do at least 50 mechanisms per chapter. Pure theory is not enough
Master retrosynthesis: go backwards from a target molecule to its precursors by identifying strategic disconnections
For Pourbaix diagrams, redo them by hand at least 10 times (Iron, Copper, Zinc) until drawing in 10 minutes
Follow green/sustainable chemistry: concours increasingly integrate these issues in topics
FAQ — Chemistry PC (Eng. Prep year 2)
Which organic reactions to master in PC?
Five iconic PC curriculum reactions: 1) Nucleophilic substitution (SN1, SN2) — foundation of all organic chemistry, 2) Elimination (E1, E2) — often competing with SN, 3) Diels-Alder reaction ([4+2] cycloaddition) — powerful tool to form rings, 4) Wittig reaction — formation of C=C double bonds, 5) Grignard reaction — C-C bond formation via organomagnesians. Mastering these 5 reactions (complete mechanisms, stereochemistry, applications) covers ~70% of organic chemistry concours questions.
What is a Pourbaix diagram?
A Pourbaix diagram (or potential-pH) represents the stability of an element's species as a function of redox potential E and pH. Axes are E (vertical) and pH (horizontal). Boundaries between zones correspond to equilibria: vertical (acid-base), horizontal (redox without H+/OH-), oblique (redox with H+/OH-). Application: predict if a metal corrodes in a given solution, choose electrolysis conditions, optimize a process. Tested at every concours.
Is PC chemistry oral hard?
Yes, chemistry oral at concours (Mines, Centrale, Polytechnique) is demanding. Typical format: random topic draw, 30 min prep, 30 min presentation + questions. Three keys: 1) Impeccable theoretical mastery (mechanisms, equilibria, electrochemistry), 2) Live concept manipulation (no recitation), 3) Scientific culture to open the topic (industrial applications, green chemistry, current events). Prepare with 50+ oral presentations in year two. Colles are the main training.
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