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Paper-II (300 marks)
- This paper viz Paper - II will consist Graduation paper in which recruitment will carried out.
- The Questions for this paper are also of Objective Type and Multiple-Choice Questions (MCQs) type
- Each Question carries 2 Marks for correct answer and no any deduction for wrong answer.
- This paper will contains a total of 150 questions.
- The question paper will be in both Hindi and English medium.
- The candidate will have to a minimum 50% marks for Gen/BC-I/BC-II and 45% for ST/SC candidates, to make it to be considered for JSSC Lab Assistant 2023 Final Merit List.
| Paper-II: Chemistry | No of Questions/Marks |
Chemistry | 150 Questions/300 Marks |
Time Duration | 03 Hours |
Paper- II (Chemistry)
Atomic structure, Periodic properties and chemical bonding
Idea of de Broglie matter waves, Heisenberg uncertainty principle, atomic orbitals, Schrodinger wave equation, significance of Ψ and Ψ2 , quantum numbers, radial and angular wave functions and probability distribution curves, shapes of S, p, and d orbitals, Aufbau and Pauli’s exclusion principles, Hund's rule, electronic configuration classification of elements as s, p, d and f-blocks. Periodic tables and periodic properties (atomic and ionic radii, ionization energy, electron affinity, electro-negativity) and their trends in periodic table, Their applications in chemical bonding. Covalen bonding. V.B. Theory, VSEPR Theory, M O. Theory, homo-nuclear and hetero-nuclear diatomic molecules, bond order and magnetic properties. Resonance, hydrogen bonds and van der Waals forces. Ionic solids - Born-Haber cycle, Fajan's rule.
Postulates of kinetic theory of gases, deviation from ideal behavior of van der Waal's equation of state. Critical temperature, pressure and volume. Liquification of gases, Critical constants and vander Waals constants, the law of corresponding states, reduced equation of state Molecular velocities — r:m.s. velocity, average velocity, most probable velocity. Maxwell's distribution of molecular velocities.
Solid State
Space lattice, Unit cell. Laws of crystallography. X-ray diffraction by crystals. Bragg's equation coordination number radius ratio rule, detects in crystals and their magnetic and electric behavior semi-conductors and super conductors.
Thermodynamics
Laws of thermodynamics, work, heat, energy. State functions — E, H, S and G and their significance criteria for chemical equilibrium and spontaneity of reactions. Variations of free energy with T, P and V Gibbs Helmhotts equation. Entropy changes in gases for reversible and irreversible processes. Hess law Bond energy.
Chemical kinetics and catalysis
Order and molecularity, chemical kinetics and its scope, rate of a reaction, factors influencing rate of reaction. Rate equations of zero, first and second order reactions. Pseudo order, half life and mean life. Determination of order of reactions. Theories of chemical kinetics — collision theory, transition state theory, Arrhenius equation, concept of activation energy, effect of temperature on rate constant. Catalysis, characteristics of catalysed reactions, theories of catalysis, examples.
Electrochemistry
Electronic conduction in electrolytic solutions, specific, equivalents and molar conductance, effect of dilution on them, cell constant, experimental method of determining conductance. Migration of ions and Kohlrausch, law. Arrhenius theory of electorlytic dissociation and its limitations, weak and strong electrolytes Ostwald's dilution law, its uses and limitations Debye - Huckel Onsager's equation (elementary treatment) Transport number - definition, determination by Hittor method. Galvanic cells, electrodes and electrode reactions, Nernst equation, E.M.F. of cells, Hydrogen electrode, electrochemical series, concentration cell and their applications pH . Buffer solutions theory of buffer action,
Transition and inner transition metals and complexes
General characteristics of d-block elements, co-ordination components - nomenclature, isomerism and bonding in complexes V.B. theory and crystal field theory. Werners theory, eAN metal carbonyls, cyclopentadienys, olefin and acetylene complexes. Compounds with metal-metal bonds and metal atom clusters. General chemistry of f-block elements Lanthanides and actinides - ionic radic, separation, oxidation states, magnetic and spectral properties.
Non-aqueous solvents
Physical properties of a solvent, types of solvents and their general characteristics, reactions in non-aqueous solvents with reference to liqued NH3 and liquid SO2.
Photochemistry
Interaction of radiation with matter, difference between thermal and photochemical processes. Lawa of photochemistry — GrothusDrapper law, stark-Einstein law, Jablonski diagram. Fluerescence. phosphorescence, Quantum yield Photoelectric cells.
Hard and Soft acids and bases
Classification of acids and bases as hard and soft, Pearson's HSAB concept, acid-base strength and hardness and softness, symbiosis, theoretical basis of hardness and softness, symbiosis, theoretical basis of hardness and softness, electronegativity and hardness and softness.
Structure and Binding
Hybridization, bond lengths and bind angles bond energy, localized and delocalized chemical bond, van der Waals interactions, inclusion compounds, clatherates, charge transfer complexes, resonance, hyperunjugation, aromaticity, inductive and field effects, hydrogen bonding.
Mechanism of organic reactions
Homolytic and heterolytic bond breaking, types of reagents - carbocations. and nucleophiles, types of organic reactions, Reactive intermediates - Carbocations, carbanions, free radicals, carhbenes, arynes and nitrenes (with examples) Different types of addition, substitution and elimination reactions - SN1 , SN2 , SNi , E1, E2, E1cb etc.
Stereochemistry of Organic Compounds
Isomerism, Optical isomerism - elements of symmetry, molecular chirality, enantiomers, stereogenic centre, optical activity properties of enantiomers, chiral and achiral moleculers with tar stereogenic centres, diastereomers. threo and erythro diastereomers, meso compounds, resolution of enantiomers. inversion, retention and racemizarion. Relative and absolute configuration requence rule, D & L and R & S nomenclature. Geometric isomerism: Determination of configuration of geometric isomers - E & Z nomenclature, geometric isomerism ot oximes and alecyclic compounds. Configuration and confurmation, conformations of ethane, butane and cyclohexane.
Organometallic Compounds
Organometallic compounds of Mg. Li & Zn their formation, preparation, structure and systhetic applications.
Organic Synthesis via enolates
Acidity of α-llydrogens, preparation, properties and synthetic applications of diethyl malonate and eithyl acctoacetate, keto-enol tautomeins.
Carbohydrates
Classification and nomenclature Monosacharides, mechanism of asazone formation, interconversion of glucose and fructose, chain lengthening and chain shortening of aldoses and ketoses, Anomers and epimers Formation of glycosides, ethers and esters Ring structure of glucose and fructose mechanism of mutarotation.
Polymers
Addition or chain growth polymerization. Free radical vingt polymerization, ionic vingl polymerizations, Ziegler - Natta polymerization and vinigl polymers. Condensation or step-growth polymerization, Polyesters, polyamider, phenol-formaldelyde resins, urea-formaldelyde resins, epoxy.resins and polyurethanes. Natural and synthetic rubbers. Inorganic polymeric systems - silicones and phosphazenes, nature of bonding in triphosphazenes.
Study of following types of organic compounds:
Alkanes and cycloalkanes: Preparation of alkanes - wartz reactions Kolbe reaction, Corey - House reaction etc physical and chemical properties, free-radical halogenation of alkanes - reactivity and selectivity. Cycloalkanes : Nomenclature, formation, properties - Baeger's strain theory.
Alkenes, cyclocalkenes, Diencs & Alkynes: Mechanism of dehydration of alcohols, and delydrogenation of alkyl halides, regioselectivity in alcohol dehydration. The saytzeff rule, Hofmanu elimination Mechanisn involved in hydrogenation, electrophilic and free radical additions, markownikoffs rule, kharasch effect, hydroboration - oxidation, oxymercuration - reduction, Epoxidation, Ozonolysis, hydration, hydroxyltion and oxidation with KMnOu. Polymenization. Substitution at the allylic and vinylic positions of alkenes. Uses Dienes: Classificatin, preparation, properties Alkyness : Preparation, properties, acidic reactions of alkynes, mechanism of electrophilic and nucleophilic addition reactions, hydroboration - oxidation, metal-ammonia reductins, oxidation and polymerization.
Arenes and Aromaticity: Aromaticity : The Huckel rule, arematic ions, M.O. diagram, anti-aromatic, Aromatic electrophilic substitution — Mechanism, role of σ and Ï€ complexes. Mechanism of nitration, halogenters sulphonation, mercuration and Friedel Crafts reaction. Energy profile diagram, activating and deactivating substituents, orientation, ortho-para ratio. Side-chain reactions of benzene derivatives. Birch reduction.
Study of Some reactions
- Pinacol - Pinacotone Rearrangement
- Aldol Reaction
- Perkin Reaction
- Cannizzaro's Reaction
- Mannich Reaction
- Clemmensen Reduction
- Claisen Rearrangement
- Peimer Tiemann Reaction
- Friedel Crafts reaction
- Fries rearrangement
- Reformatsky reaction.
Spectroscopy
Basic principles of the following type of spectroscopy and their applications in determining structures.
- UV - Visible spectroscopy
- IR Spectroscopy
- NMR Spectroscopy
- Mass Spectroscopy
- ESR Spectroscopy (cemplexes)
For more details about JLACE- 2023 and its Paper- I
JSSC Lab Assistant Exam Previous Year Question Papers (PYQs)
Jharkhand Staff Selection Commission (JSSC) going to conduct Jharkhand Laboratory Assistant Competitive Examination (JLACE)- 2023 for the first time on the behalf of Govt of Jharkhand for the recruitment of Laboratory Assistant to a total of 690 vacancies in different laboratories of government's institutions & state owned laboratories.
Although, JSSC had notified regarding the same in the year 2022 as named Jharkhand Laboratory Assistant Competitive Examination (JLACE)- 22022, conducted the exam as well.
But unfortunately, it was cancelled along with dozens of recruitment notifications released by JSSC due to Hon'ble Jharkhand High Court judgement on Domicile Policy based on which these recruitment had to be completed.
And for that reason, the previous year's question paper viz JLACE 2022 has been not released !
Note : You can can go through to other state's Previous Year's Question Papers (PYQs) of Laboratory Assistant/ Lab Technician exams for practice purposes.
Other State's Previous Year's Question Paper
RPSC Lab Assistant 2022 Paper
Paper- I (28/06/2022)
Paper- II (28/06/2022)
Paper- I (29/06/2022)
Paper- II (29/06/2022)
Check Also :
JSSC Lab Assistant Exam : Paper- II (Physics)
JSSC Lab Assistant Exam : Paper- II (Biology)
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For any other future notice and updates regarding the JLACE 2023 exam, do visit the official website of JPSC or Join Our Telegram Channel. (Link/icon given below.)
