AIIMS 2019 Exam will be conducted on 25th and 26th May. It will include questions from Physics, Chemistry, Biology and General Knowledge. An important aspect of this examination is that there is an equal weight-age to Physics, Chemistry and Biology (60 questions from each section) which is somewhat different from NEET 2018, where Biology accounted for 90 questions, Physics and chemistry with 45 questions respectively. That means Physics and Chemistry is as important as Biology for AIIMS.
Keeping this in mind, we have assembled the list of all important topics to revise in Chemistry
Units | Topics |
Some Basic concepts in Chemistry | Dalton’s atomic theory; mole concept, molar mass, percentage composition, Chemical equations and stoichiometry. |
States of Matter | Gas laws and Ideal gas equation, Bragg’s Law and its applications; Unit cell and lattices, packing in solids (fcc, bcc and hcp lattices), voids, defects |
Atomic Structure | Bohr model of hydrogen atom, Heisenberg uncertainty principle, concept of atomic orbitals as one electron wave functions; Variation of Ψ and Ψ2 with r for 1s and 2s orbitals; shapes of s, p and d - orbitals, electron spin and spin quantum number; Pauli’s exclusion principle and Hund’s rule |
Chemical Bonding and Molecular Structure | Ionic Bonding: factors affecting the formation of ionic bonds; calculation of lattice enthalpy. Covalent Bonding: Fajan’s rule, dipole moment; Valence Shell Electron Pair Repulsion (VSEPR) theory and shapes of simple molecules. Quantum mechanical approach to covalent bonding: Valence bond theory - Its important features, concept of hybridization involving s, p and d orbitals; Resonance. Molecular Orbital Theory - types of molecular orbitals (bonding, antibonding), sigma and pi-bonds, molecular orbital electronic configurations of homonuclear diatomic molecules |
Chemical Thermodynamics | First law of thermodynamics: heat internal energy and enthalpy, heat capacity, molar heat capacity; Hess’s law of constant heat summation; Enthalpies of bond dissociation, combustion, formation, atomization. Second law of thermodynamics: ΔS of the universe and ΔG of the system as criteria for spontaneity, ΔGo (Standard Gibbs energy change) and equilibrium constant. |
Solutions | Concentrations, Raoult’s Law - Ideal and non-ideal solutions, vapour pressure - composition, Determination of molecular mass using colligative properties; van’t Hoff factor. |
Equilibrium | Equilibria involving physical processes: Henry’s law Equilibria involving chemical processes: equilibrium constants (Kp and Kc) and their significance, factors affecting equilibrium concentration, pressure, temperature, Le Chatelier’s principle. Ionic equilibrium: concepts of acids and bases (Arrhenius, Bronsted - Lowry and Lewis) and their ionization |
Redox Reactions and Electrochemistry | oxidation number, rules for assigning oxidation number, balancing of redox reactions. Electrolytic and metallic conduction, conductance in electrolytic solutions, Electrochemical cells - emf of a Galvanic cell and its measurement; Nernst equation and its applications; Relationship between cell potential and Gibbs’ energy change; Dry cell and lead accumulator; Fuel cells |
Chemical Kinetics | elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units, differential and integral forms of zero and first order reactions, Arrhenius theory, activation energy and its calculation |
Surface Chemistry | Adsorption -factors affecting adsorption of gases on solids - Freundlich and Langmuir adsorption isotherms Catalysis - enzyme catalysis and its mechanism. Colloidal state - multi molecular, macromolecular and associated colloids (micelles), properties of colloids - Tyndall effect, Brownian movement, electrophoresis, dialysis, coagulation and flocculation |
Inorganic Chemistry Topics for AIIMS
Units | Topics |
Classification of Elements and Periodicity in Properties | periodic trends in properties of elements; atomic and ionic radii, ionization enthalpy, electron gain enthalpy, valence, oxidation states and chemical reactivity. |
General Principles and Process of Isolation of Metals | steps involved in the extraction of metals - concentration, reduction (chemical. and electrolytic methods); extraction of Ag, Au, Al, Cu, Zn and Fe |
Hydrogen | preparation, properties and uses of hydrogen; Structure, preparation, reactions and uses of hydrogen peroxide; |
s - Block Elements (Alkali and Alkaline Earth Metals) | anomalous properties of the first element of each group, diagonal relationships. |
P- Block Elements | Electronic configuration and general trends in physical and chemical properties of elements across the periods and down the groups |
d – and f – Block Elements | electronic configuration, occurrence and characteristics, general trends in properties of the first row transition elements ; lanthanoids and actinoids |
Co-ordination Compounds | Werner’s theory; isomerism; Importance of coordination compounds |
Environmental Chemistry | Gaseous pollutants: Green house effect and Global warming; Acid rain; Particulate pollutants: Smoke, dust, smog, fumes, mist; their sources, harmful effects and prevention. |
Organic Chemistry for AIIMS
Units | Topics |
Purification and Characterisation of Organic Compounds | Quantitative analysis (basic principles only) - Estimation of carbon, hydrogen, nitrogen, halogens, sulphur, phosphorus. |
Some Basic Principles of Organic Chemistry | hybridization (s and p); Electronic displacement in a covalent bond - Inductive effect, electromeric effect, resonance and hyperconjugation. |
Hydrocarbons | Mechanism of halogenation of alkanes; Markownikoff’s and peroxide effect; Mechanism of electrophilic substitution: halogenation, nitration, Friedel - Craft’s alkylation and acylation, directive influence of functional group in monosubstituted benzene. |
Organic Compounds Containing Halogens | Properties and reactions; Nature of C-X bond; Mechanisms of substitution reactions. |
Organic Compounds Containing Oxygen | Alcohols, Phenols and Ethers: electrophilic substitution reactions: halogenation, nitration and sulphonation, Reimer - Tiemann reaction. Aldehyde and Ketones: Nucleophilic addition reactions (addition of HCN, NH3 and its derivatives), Grignard reagent; oxidation; reduction (Wolff Kishner and Clemmensen); aldol condensation |
Organic Compounds Containing Nitrogen | Amines: identification of primary, secondary and tertiary amines and their basic character. |
Polymers | some important polymers with emphasis on their monomers and uses - polythene, nylon, polyester and bakelite. |
Biomolecules | monosaccharides of oligosaccharides (sucrose, lactose, maltose); denaturation of proteins, enzymes. |
Chemistry in Everyday Life | Analgesics, tranquilizers, antiseptics, disinfectants, antimicrobials, antifertility drugs, antibiotics, antacids, antihistamins - their meaning and common examples; Soaps and detergents |
Principles Related to Practical Chemistry | Chemistry involved in the titrimetric excercises - Acids bases and the use of indicators, oxalic-acid vs KMnO4, Mohr’s salt vs KMnO4. Detection of hydroxyl (alcoholic and phenolic), carbonyl (aldehyde and ketone). |
For Most important topics of Physics, click on the link below:
AIIMS 2019 Physics: Most important Topics
For Most important topics of Biology, click on the link below:
AIIMS 2019 Biology: Most important Topics
All the best!!
Team BYJU'S Exam Prep
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