Free Chemistry guides, exam strategies, and subject deep-dives written by PK Sir — IIT Roorkee alumni with 18+ years of coaching experience. New post every Monday.
Electronic configuration exceptions, colour and magnetism, variable oxidation states, KMnO4/K2Cr2O7 chemistry and lanthanoid contraction — PK Sir's complete guide to Transition Metals & Lanthanoids, with 8 exam traps and an FAQ.
Hand-picked Chemistry guides, exam strategies and subject explainers for IIT JEE and NEET aspirants.
Nucleophilic addition, Aldol condensation vs Cannizzaro, the iodoform test, HVZ reaction and carboxylic acid acidity — with 8 exam traps.
NEET Strategy11.21 lakh qualified out of nearly 20 lakh candidates. Counselling timelines, dropper-year strategy, and why Chemistry is your biggest lever right now.
Physical ChemistryRaoult's law, elevation of boiling point, depression of freezing point, osmotic pressure and the van't Hoff factor — with 8 exam traps.
Physical ChemistryUnit cell packing efficiencies, the universal density formula, tetrahedral & octahedral voids, Schottky & Frenkel defects — with 8 exam traps.
Inorganic ChemistryGroup 13–18 trends, anomalous behaviour of B, N, O, F, oxoacids of nitrogen, phosphorus & chlorine, noble gas compounds — with 8 exam traps.
Physical ChemistrypH scale, Ka–Kb–Kw, Henderson-Hasselbalch, hydrolysis of salts, Ksp, common ion effect — with 8 exam traps.
Inorganic ChemistryIUPAC naming, all 6 isomerism types, spectrochemical series, high/low spin, magnetic moment — with 8 exam traps.
Physical ChemistryFirst & second law, types of enthalpy, Hess's law, bond enthalpy, spontaneity and the crossover temperature — with 8 exam traps.
Physical ChemistryKc, Kp, reaction quotient, Le Chatelier's four levers, degree of dissociation, Ksp — with 8 exam traps and a solved ICE table.
Physical ChemistryRate laws, order of reaction, integrated rate equations, Arrhenius equation — and the 7 traps examiners set every year.
Articles are great. Direct one-to-one coaching is better. Book a free 30-minute demo class with PK Sir.