IFoS--2021-22

• CANDIDATES APPLYING FOR INDIAN FOREST SERVICE EXAMINATION SHOULD NOTE THAT THEY ARE REQUIRED TO APPEAR IN THE CIVIL SERVICES (PRELIMINARY) EXAMINATON AND QUALIFY THE SAME FOR GOING TO THE SECOND STAGE OF INDIAN FOREST SERVICE (MAIN) EXAMINATION (WRITTEN AND INTERVIEW). • CANDIDATES DESIROUS OF APPLYNG FOR INDIAN FOREST SERVICE EXAMINATION AS WELL AS FOR CIVIL SERVICES EXAMINATION CAN APPLY THROUGH A COMMON ONLINE APPLICATION FORM SUBJECT TO MEETING THE REQUISITE ELIGIBILITY CRITERIA BY THEM. 1. CANDIDATES TO ENSURE THEIR ELIGIBILITIY FOR THE EXAMINATION: All candidates (male/female/transgender) are requested to carefully read the Rules of Indian Forest Service Examination notified by the Government (Ministry of Environment, Forest and Climate Change) and this Notice of Examination derived from these Rules. Candidates applying for the examination should ensure that they fulfill all eligibility conditions for admission to the Examination. Their admission at all the stages of the examination will be purely provisional subject to satisfying the prescribed eligibility conditions. Mere issue of Admission Certificate to the candidate will not imply that his/her candidature has been finally cleared by the Commission. Verification of eligibility conditions with reference to original documents is taken up only after the candidate has qualified for Interview/Personality Test. The Commission takes up verification of eligibility conditions with reference to original documents only after the candidate has qualified for Interview/ Personality Test.

SYLLABI FOR THE EXAMINATION NOTE : Candidates are advised to go through the Syllabus published in this Section for the Preliminary Examination and the Main Examination. Part A-Preliminary Examination Paper I - (200 marks) Duration : Two hours • • • • • • •

Current events of national and international importance .

History of India and Indian National Movement .

Indian and World Geography- Physical, Social, Economic Geography of India and the World.

Indian Polity and Governance- Constitution, Political System, Panchayati Raj, Public Policy, Rights Issues, etc.

Economic and Social Development- Sustainable Development, Poverty, Inclusion, Demographics, Social Sector Initiatives, etc.

General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization.

General Science.

Paper II- (200 marks) Duration : Two hours •

Comprehension • Interpersonal skills including communication skills;

• Logical reasoning and analytical ability

• Decision making and problem solving

• General mental ability • Basic numeracy (numbers and their relations, orders of magnitude, etc.) (Class X level), Data interpretation (charts, graphs, tables, data sufficiency etc. - Class X level)

Note 1: Paper-II of the Civil Services (Preliminary) Examination will be a qualifying paper with minimum qualifying marks fixed at 33%. Note 2 : The questions will be of multiple choice, objective type. Note 3: It is mandatory for the candidate to appear in both the Papers of Civil Services (Prelim) Examination for the purpose of evaluation. Therefore a candidate will be disqualified in case he/she does not appear in both the papers of Civil Services (Prelim) Examination.

B. MAIN EXAMINATION: (A) The written examination consisting of the following papers:— Paper I—General English 300 Marks Paper II—General Knowledge 300 Marks Papers III, IV, V and VI.—Any two subjects to be selected from the list of the optional subjects set out in para 2 below. Each subject will have two papers.— 200 marks for each paper. Note : Answer scripts of only those candidates who have obtained the minimum marks as decided by the Commission for Paper II (General Knowledge) will be evaluated. (B) Interview for Personality Test (See Part C of Section II of this Appendix) of such candidates as may be called by the Commission— Maximum Marks : 300 2. List of optional subjects : (i) Agriculture (ii) Agricultural Engineering (iii) Animal Husbandry & Veterinary Science (iv) Botany (v) Chemistry (vi) Chemical Engineering (vii) CivilEngineering (viii) Forestry (ix) Geology (x) Mathematics (xi) Mechanical Engineering (xii) Physics (xiii) Statistics (xiv) Zoology.

Provided that the candidates will not be allowed to offer the following combination of subjects : (a) Agriculture and Agricultural Engg. (b) Agriculture and Animal Husbandry & Veterinary Science. (c) Agriculture and Forestry. (d) Chemistry and Chemical Engg. (e) Mathematics and Statistics. (f) Of the Engineering subjects viz. Agricultural Engineering, Chemical Engineering, Civil Engineering and Mechanical Engineering—not more than one subject; NOTE—The standard and syllabi of the subjects mentioned above are given in Section III. General Instructions (Main Examination) : 1. All the question papers for the examination will be of conventional (essay) type. 2. ALL QUESTION PAPERS MUST BE ANSWERED IN ENGLISH. QUESTION PAPERS WILL BE SET IN ENGLISH ONLY. 3. The duration of each of the papers referred to above will be three hours. 4. The Commission have discretion to fix qualifying marks in any or all the papers of the examination. 5. If a candidate's handwriting is not easily legible, deduction will be made on this account from the total marks otherwise accruing to him/her. 6. Marks will not be allotted for mere superficial knowledge. 7. Credit will be given for orderly, effective and exact expression combined with due economy of words in all subjects of the examination. 8. In the question papers, wherever required, SI units will be used.

CHEMISTRY PAPER-I

1. Atomic structure Quantum theory, Heisenberg's uncertainty principle, Schrödinger 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, factors affecting stability 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 homonuclear molecules: H2+, H2 to Ne2, NO, CO, HF, CN, CN-, BeH2 and CO2. Comparison of valence bond and molecular oribtal theories, bond order, bond strength and bond length. 3. SOLID STATE Forms of solids, law of constancy of interfacial angles, crystal systems and crystal classes (crystallographic groups). Designation of crystal faces, lattice structures and unit cell. Laws of rational indices. 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, CaF2, CdI2 and rutile. Imperfections in crystals, stoichiometric and non-stoichiometric defects, impurity defects, semi-conductors. Elementary study of liquid crystals. 4. The gaseous state Equation of state for real gases, intermolecular interactions, liquification of gases and critical phenomena, Maxwell's distribution of speeds, intermolecular collisions, collisions on the wall and effusion.

5. Thermodynamics and statistical thermodynamics Thermodynamic systems, states and processes, work, heat and internal energy; first law of thermodynamics, work done on the systems and heat absorbed in different types of processes; calorimetry, energy and enthalpy changes in various processes and their temperature dependence. Second law of thermodynamics; entropy as a state function, entropy changes in various process, entropy-reversibility and irreversibility, Free energy functions; criteria for equilibrium, relation between equilibrium constant and thermodynamic quantities; Nernst heat theorem and third law of thermodynamics. Micro and macro states; canonical ensemble and canonical partition function; electronic, rotational and vibrational partition functions and thermodynamic quantities; chemical equilibrium in ideal gas reactions. 6. Phase equilibria and solutions Phase equilibria in pure substances; Clausius-Clapeyron equation; phase diagram for a pure substance; phase equilibria in binary systems, partially miscible liquids-upper and lower critical solution temperatures; partial molar quantities, their significance and determination; excess thermodynamic functions and their determination. 7. 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-voltametry, polarography, amperometry, cyclic-voltametry, ion selective electrodes and their use.

8. Chemical kinetics Concentration dependence of rate of reaction; defferential and integral rate equations for zeroth, first, second and fractional order reactions. Rate equations involving reverse, parallel, consecutive and chain reactions; effect of temperature and pressure on rate constant. Study of fast reactions by stop-flow and relaxation methods. Collisions and transition state theories. 9. Photochemistry Absorption of light; decay of excited state by different routes; photochemical reactions between hydrogen and halogens and their quantum yields.

10. Surface phenomena and catalysis Adsorption from gages and solutions on solid adsorbents, adsorption isotherms- Langmuir and B.E.T. isotherms; determination of surface area, characteristics and mechanism of reaction on heterogeneous catalysts. 11. Bio-inorganic chemistry Metal ions in biological systems and their role in ion-transport across the membranes (molecular mechanism), ionophores, photosynthesis-PSI, PSII; nitrogen fixation, oxygen-uptake proteins, cytochromes and ferredoxins. 12. Coordination chemistry (a) Electronic configurations; introduction to theories of bonding in transition metal complexes. Valence bond theory, crystal field theory and its modifications; applications of theories in the explanation of magnetism and electronic spactra of metal complexes. (b) 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. (c) Synthesis and structures of metal carbonyls; carboxylate anions, carbonyl hydrides and metal nitrosyl compounds. (d) 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.

13. General chemistry of 'f' block elements Lanthanides and actinides; separation, oxidation states, magnetic and spectral properties; lanthanide contraction. 14. Non-Aqueous Solvents Reactions in liquid NH3, HF, SO2 and H2 SO4. Failure of solvent system concept, coordination model of non-aqueous solvents. Some highly acidic media, fluoro- sulphuric acid and super acids.

PAPER II

1. Delocalised covalent bonding : Aromaticity, anti-aromaticity; annulenes, azulenes, tropolones, kekulene, fulvenes, sydnones. 2 (a) Reaction mechanisms : General methods (both kinetic and non-kinetic) of study of mechanism or organic reactions illustrated by examples-use of isotopes, cross-over experiment, intermediate trapping, stereochemistry; energy diagrams of simple organic reactions-transition states and intermediates; energy of activation; thermodynamic control and kinetic control of reactions. (b) Reactive intermediates : Generation, geometry, stability and reactions of carbonium and carbanium ions, carbanions, free radicals, carbenes, benzynes and niternes. (c) Substitution reactions : SN1, SN2, SNi, SN1', SN2', SNi' and SRN1 mechanisms; neighbouring group participation; electrophilic and nucleophilic reactions of aromatic compound including simple heterocyclic compounds-pyrrole, thiophene, indole. (d) Elimination reactions : E1, E2 and E1cb mechanisms; orientation in E2 reactions-Saytzeff and Hoffmann; pyrolytic syn elimination-acetate pyrolysis, Chugaev and Cope eliminations. (e) Addition reactions : Electrophilic addition to C=C and C=C; nucleophilic addition to C=O, C=N, conjugated olefins and carbonyls. (f) Rearrangements : Pinacol-pinacolune, Hoffmann, Beckmann, Baeyer-Villiger, Favorskii, Fries, Claisen, Cope, Stevens and Wagner-Meerwein rearrangements. 3. Pericyclic reactions : Classification and examples; Woodward-Hoffmann rules- clectrocyclic reactions, cycloaddition reactions [2+2 and 4+2] and sigmatropic shifts [1, 3; 3, 3 and 1, 5] FMO approach. 4. Chemistry and mechanism of reactions : Aldol condensation (including directed aldol condensation), Claisen condensation, Dieckmann, Perkin, Knoevenagel, Witting, 27

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.

5. Polymeric Systems (a) Physical chemistry of polymers : Polymer solutions and their thermodynamic properties; number and weight average molecular weights of polymers. Determination of molecular weights by sedimentation, light scattering, osmotic pressure, viscosity, end group analysis methods. (b) Preparation and properties of polymers : Organic polymers-polyethylene, polystyrene, polyvinyl chloride, Teflon, nylon, terylene, synthetic and natural rubber. Inorganic polymers-phosphonitrilic halides, borazines, silicones and silicates. (c) Biopolymers : Basic bonding in proteins, DNA and RNA. 6. Synthetic uses of reagents : OsO4, HIO4, CrO3, Pb(OAc)4, SeO2, NBS, B2H6, Na- Liquid NH3, LiA1H4, NaBH4 n-BuLi, MCPBA. 7. Photochemistry : Photochemical reactions of simple organic compounds, excited and ground states, singlet and triplet states, Norrish-Type I and Type II reactions. 8. Principles of spectroscopy and applications in structure elucidation (a) Rotational spectra-diatomic molecules; isotopic substitution and rotational constants. (b) Vibrational spectra-diatomic molecules, linear triatomic molecules, specific frequencies of functional groups in polyatomic molecules. (c) Electronic spectra : Singlet and triplet states. N->π* and π->π* transitions; application to conjugated double bonds and conjugated carbonyls-Woodward-Fieser rules. (d) Nuclear magnetic resonance : Isochronous and anisochronous protons; chemical shift and coupling constants; Application of H1 NMR to simple organic molecules. (e) Mass spectra : Parent peak, base peak, daughter peak, metastable peak, fragmentation of simple organic molecules; £-cleavage, McLafferty rearrangement. (f) Electron spin resonance : Inorganic complexes and free radicals.