Some Basic Concepts of Chemistry – mole concept, percentage purity, limiting reagent. Atomic Structure – quantum numbers, de Broglie wavelength, electronic transitions. Thermodynamics – enthalpy, internal energy, Hess’s law, Gibbs free energy. Equilibrium – Le Chatelier’s principle, Ka/Kb, pH, solubility product. Redox & Electrochemistry – balancing redox, cell potential, Nernst equation. Chemical Kinetics – rate law, order, half-life, activation energy. Solutions and Colligative Properties – Raoult’s law, elevation or depression formulas. Solid State and Surface Chemistry – packing efficiency, defects, and adsorption isotherms.