IAS Mains-2016 Chemistry Syllabus


  1. Atomic Structure: Heisenberg's uncertainty principle, Schrodinger wave equation (time independent); Interpretation of wave function, particle in one-dimensional box, quantum numbers, hydrogen atom wave functions; Shapes of s, p and d orbitals.

  2. Chemical Bonding: Ionic bond, characteristics of ionic compounds, lattice energy, Born-Haber cycle; covalent bond and its general characteristics, polarities of bonds in molecules and their dipole moments; Valence bond theory, concept of resonance and resonance energy; Molecular orbital theory (LCAO method); bonding in H2 +, H2, He2 + to Ne2, NO, CO, HF, and CN +; Comparison of valence bond and molecular orbital theories, bond order, bond strength and bond length.

  3. Solid State: Crystal systems; Designation of crystal faces, lattice structures and unit cell; Bragg's law; X-ray diffraction by crystals; Close packing, radius ratio rules, calculation of some limiting radius ratio values; Structures of NaCl, ZnS, CsCl and CaF2; Stoichiometric and nonstoichiometric defects, impurity defects, semi-conductors.

  4. The Gaseous State and Transport Phenomenon: Equation of state for real gases, intermolecular interactions and critical phenomena and liquefaction of gases, Maxwell's distribution of speeds, intermolecular collisions, collisions on the wall and effusion; Thermal conductivity and viscosity of ideal gases.

  5. Liquid State: Kelvin equation; Surface tension and surface energy, wetting and contact angle, interfacial tension and capillary action.

  6. Thermodynamics: Work, heat and internal energy; first law of thermodynamics. Second law of thermodynamics; entropy as a state function, entropy changes in various processes, entropy reversibility and irreversibility, Free energy functions; Thermodynamic equation of state; Maxwell relations; Temperature, volume and pressure dependence of U, H, A, G, Cp and Cv, a± and a2 J-T effect and inversion temperature; criteria for equilibrium, relation between equilibrium constant and thermodynamic quantities; Nernst heat theorem, introductory idea of third law of thermodynamics.

  7. Phase Equilibria and Solutions: Clausius-Clapeyron equation; phase diagram for a pure substance; phase equilibria in binary systems, partially miscible liquidsupper and lower critical solution temperatures; partial molar quantities, their significance and determination; excess thermodynamic functions and their determination.

  8. Electrochemistry: Debye-Huckel theory of strong electrolytes and Debye-Huckel limiting Law for various equilibrium and transport properties. Galvanic cells, concentration cells; electrochemical series, measurement of e. m. f. Of cells and its applications fuel cells and batteries. Processes at electrodes; double layer at the interface; rate of charge transfer, current density; overpotential; electroanalytical techniques: Polarography, amperometry, ion selective electrodes and their uses.

  9. Chemical Kinetics: Differential and integral rate equations for zeroth, first, second and fractional order reactions; Rate equations involving reverse, parallel, consecutive and chain reactions; branching chain and explosions; effect of temperature and pressure on rate constant; Study of fast reactions by stop-flow and relaxation methods; Collisions and transition state theories.

  10. Photochemistry: Absorption of light; decay of excited state by different routes; photochemical reactions between hydrogen and halogens and their quantum yields.

  11. Surface Phenomena and Catalysis: Absorption from gases and solutions on solid adsorbents, Langmuir and B. E. T. Adsorption isotherms; determination of surface area, characteristics and mechanism of reaction on heterogeneous catalysts.

  12. Bio-inorganic Chemistry: Metal ions in biological systems and their role in ion transport across the membranes (molecular mechanism), oxygen-uptake proteins, cytochromes and ferredoxins.

  13. Coordination Compounds:

    1. Bonding theories of metal complexes; Valence bond theory, crystal field theory and its modifications; applications of theories in the explanation of magnetism and electronic spectra of metal complexes.

    2. Isomerism in coordination compounds; IUPAC nomenclature of coordination compounds; stereochemistry of complexes with 4 and 6 coordination numbers; chelate effect and polynuclear complexes; trans effect and its theories; kinetics of substitution reactions in square-planer complexes; thermodynamic and kinetic stability of complexes.

    3. EAN rule, Synthesis structure and reactivity of metal carbonyls; carboxylate anions, carbonyl hydrides and metal nitrosyl compounds.

    4. Complexes with aromatic systems, synthesis, structure and bonding in metal olefin complexes, alkyne complexes and cyclopentadienyl complexes; coordinative unsaturation, oxidative addition reactions, insertion reactions, fluxional molecules and their characterization; Compounds with metal-metal bonds and metal atom clusters.

  14. Main Group Chemistry: Boranes, borazines, phosphazenes and cyclic phosphazene, silicates and silicones, Interhalogen compounds; Sulphur nitrogen compounds, noble gas compounds.

  15. General Chemistry of ‘f’ Block Elements: Lanthanides and actinides; separation, oxidation states, magnetic and spectral properties; lanthanide contraction.


  1. Delocalised Covalent Bonding: Aromaticity, anti-aromaticity; annulenes, azulenes, tropolones, fulvenes, sydnones.

  2. It Includes

    1. Reaction Mechanisms: General methods (both kinetic and non-kinetic) of study of mechanism of organic reactions: Isotopic method, cross-over experiment, intermediate trapping, stereochemistry; energy of activation; thermodynamic control and kinetic control of reactions.

    2. Reactive Intermediates: Generation, geometry, stability and reactions of carbonium ions and carbanions, free radicals, carbenes, benzynes and nitrenes.

    3. Substitution Reactions: SN1, SN2 and SNi mechanisms; neighbouring group participation; electrophilic and nucleophilic reactions of aromatic compounds including heterocyclic compoundspyrrole, furan, thiophene and indole.

    4. Elimination Reactions: E1, E2 and E1cb mechanisms; orientation in E2 reactionsSaytzeff and Hoffmann; pyrolytic syn elimination Chugaev and Cope eliminations.

    5. Addition Reactions: Electrophilic addition to C = C and C triple bond C; nucleophilic addition to C = 0, C triple bond N, conjugated olefins and carbonyls.

    6. Reactions and Rearrangements:

      1. Pinacol-pinacolone, Hoffmann, Beckmann, BaeyerVilliger, Favorskii, Fries, Claisen, Cope, Stevens and Wagner-Meerwein rearrangements.

      2. Aldol condensation, Claisen condensation, Dieckmann, Perkin, Knoevenagel, Witting, Clemmensen, Wolff-Kishner, Cannizzaro and von Richter reactions; Stobbe, benzoin and acyloin condensations; Fischer indole synthesis, Skraup synthesis, Bischler-Napieralski, Sandmeyer, Reimer-Tiemann and Reformatsky reactions.

  3. Pericyclic Reactions: Classification and examples; Woodward-Hoffmann rules electrocyclic reactions, cycloaddition reactions [2 + 2 and 4 + 2] and sigmatropic shifts [1, 3; 3, 3 and 1, 5] FMO approach.

  4. It Includes

    1. Preparation and Properties of Polymers: Organic polymerspolyethylene, polystyrene, polyvinyl chloride, teflon, nylon, terylene, synthetic and natural rubber.

    2. Biopolymers: Structure of proteins, DNA and RNA.

  5. Synthetic Uses of Reagents: OsO4, HIO4, CrO3, Pb (OAc) 4, SeO2, NBS, B2H6, Na-Liquid NH3, LiAlH4, NaBH4, n-BuLi and MCPBA.

  6. Photochemistry: Photochemical reactions of simple organic compounds, excited and ground states, singlet and triplet states, Norrish-Type I and Type II reactions.

  7. Spectroscopy: Principle and applications in structure elucidation:

    1. Rotational: Diatomic molecules; isotopic substitution and rotational constants.

    2. Vibrational: Diatomic molecules, linear triatomic molecules, specific frequencies of functional groups in polyatomic molecules.

    3. Electronic: Singlet and triplet states; n p * and p p * transitions; application to conjugated double bonds and conjugated carbonylsWoodward-Fieser rules; Charge transfer spectra.

    4. Nuclear Magnetic Resonance (1H NMR): Basic principle; chemical shift and spin-spin interaction and coupling constants.

    5. Mass Spectrometry: Parent peak, base peak, metastable peak, McLafferty rearrangement