💧 Solutions
- Raoult's Law: Ideal vs Non-Ideal solutions (+ve and -ve
deviations)
- Colligative Properties: RLVP, Elevation of B.P., Depression of
F.P., Osmotic Pressure.
- Van't Hoff Factor (i): Abnormal molar mass. Remember: i =
Obs/Calc
ΔTb = i * Kb * m
π = i * C * R * T
⚡ Electrochemistry
- Nernst Equation: Calculate EMF exactly. Direct 3 mark numerical!
- Kohlrausch Law: Molar conductivity at infinite dilution.
- Faraday's Laws: Mass deposited = Z*I*t
- Batteries: Lead storage battery recharge reactions.
E_cell = E°_cell - (0.0591/n) * log(Q)
ΔG° = -nFE°_cell
⏱️ Chemical Kinetics
- Order & Molecularity: Differences and units of rate constant (k).
- Zero & First Order: Integrated rate equations and Half-life
(t1/2).
- Arrhenius Equation: Effect of temp and catalyst on reaction rate.
First Order k = (2.303/t) * log[R0/R]
t1/2 = 0.693 / k
🔄 Sn1 vs Sn2 & Haloalkanes
- Sn1: 3° > 2° > 1° (Carbocation). Racemization occurs.
- Sn2: 1° > 2° > 3° (Steric hindrance). Inversion of configuration.
- Name Reactions: Sandmeyer, Finkelstein, Swarts, Wurtz-Fittig.
- Markovnikov's Rule vs Peroxide Effect (Anti-Markovnikov).
🍷 Alcohols, Phenols, Ethers
- Acidity: Phenol > Water > Alcohol. Effect of EWG (-NO2) and ERG
(-CH3) on phenol acidity.
- Name Reactions: Kolbe's reaction, Reimer-Tiemann, Williamson
ether synthesis.
- Distinction Tests: Lucas test (1°, 2°, 3° alcohols).
🍋 Aldehydes, Ketones, Carboxylic
- Tollens' & Fehling's Test: Guaranteed question. Aldehydes give
positive, ketones negative.
- Aldol Condensation: Alpha-H required.
- Cannizzaro Reaction: No alpha-H required (HCHO, PhCHO).
- Clemmensen & Wolff-Kishner reduction for C=O to CH2.
- HVZ Reaction: Halogenation of carboxylic acids.
🐟 Amines
- Basic Character: Order in aq vs gas phase. Gabriel phthalimide
synthesis.
- Tests: Carbylamine Test & Hinsberg Test.
- Reactions: Hoffmann bromamide, Diazonium salts.
🧬 Biomolecules
- Carbohydrates: Glucose structures, Anomers, Mutarotation.
- Proteins: Denaturation, Peptide bonds, 1°/2° structures.
- Nucleic Acids: DNA vs RNA, Vitamins (fat/water soluble).
Master All "Name Reactions" & "Distinction Tests" for 100%
success!
Organic Chemistry makes up almost half the paper (33/70 marks).