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BTSC Laboratory Assistant (Science) Syllabus 2026, Exam Pattern
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BTSC Laboratory Assistant (Science) Syllabus 2026, Exam Pattern
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BTSC Laboratory Assistant (Science) Syllabus 2026, Exam Pattern, Exam Date 2026
| Organization Name | Bihar Technical Service Commission (Bihar BTSC) |
| Posts Name | Laboratory Assistant (Science) |
| No of Posts | 164 |
| Application Mode | Online |
| Category | Syllabus and Exam Pattern |
| Job Location | Bihar |
| Official website | btsc.bihar.gov.in |
Unit-1. Atomic Structure and Chemical Bonding
Atoms and its fundamental particles.
Rutherford Model of Atom.
Bohr's Theory, Hydrogen spectrum explanation based on Bohr's Model of Atom.
Wave Mechanical model of atom, de Broglie relationship, Heisenberg Uncertainly Principle
Quantum Numbers, Shapes of Atomic Orbitals.
Pauli's Exclusion Principle, Hund's Rule of Maximum Multiplicity, Aufbau Principle, Electronic Configuration (till atomic number 30).
Concept of Chemical bonding - Cause of chemical bonding, Types of Bonds: lonic Bond (Nacl, Cacl,, MgO),
Covalent Bond, Polar and Nonpolar Covalent Bonds (H₂,F2, HF, HCI) & Co-ordinate
Bond (CO, NH,O3, H2SO4).
Dipole Moment (NH3, NF3), Hydrogen bonding.
Hybridization and molecular geometries.
Unit-2. Solutions :
Types of solutions, expression of concentration of solutions.
Colligative properties- relative lowering of vapour pressure, Raoults laws.
Elevation of boiling point, depression of freezing point and osmotic pressure.
Determination of molecular masses. using colligative properties.
Abnormal molecular masses and Van't Hoff factor.
Unit-3. Water :
Introduction, sources of water. Hardness of Water-Temporary & Permanent hardness.
Degree of Hardness (In terms of CaCO, equivalent), Unit of Hardness, Quantitative Measurement of Water Hardness by EDTA method.
Municipal supply of Water, Treatment of water, Water Softening Technique-Soda Lime process, Zeolites method and ion exchange method.
Water quality Index- Biological Oxygen Demand, Chemical Oxygen Demand, Determination of Dissolved Oxygen.
Indian standard specification of drinking water.
Unit-4. Engineering materials
Natural Occurrence of Metals- Minerals, ores.
Metallurgy- General principles of Metallurgy, Gangue, Flux and Slag, Steps involved in metallurgy. Extraction of Aluminium, Iron, & copper from their important ores along with reactions, Properties and uses. Polymers-Homo-polymers and Copolymers, Natural polymers and synthetic polymers, Addition and Condensation polymerization, Thermoplastic and Thermosetting plastic.
Monomers, applications and synthesis of Polythene, PVC, Orlon, Terylene, Nylon 66, Nylon 6, Bakelite.
Natural Rubber and its vulcanization, advantages of vulcanized rubber.
Unit-5. Chemistry of Fuel and Lubricants
Fuels, Characteristics of an Ideal Fuel Classification of Fuel-Solid, Liquid and gas fuel, Calorific Values (HCV and LCV)
Petroleum and its fractional distillation
Cracking, Knocking, Fuel Rating (Octane Number, Cetane number)
Composition, Uses, advantages and disadvantages of LPG, CNG and Biogas
Lubricants Classification of Lubricants with examples, Functions and Properties of Good Lubricants
Viscosity & Viscosity Index, Flash point, Fire point, Cloud & Pour point
Unit-6. Electrochemistry
Introduction, Electrolyte and Nonelectrolyte, Electrolyte and Metallic Conduction, Factors affecting Electrolytic Conductance.
Molar Conductivity and Equivalent Conductivity, Variation of Molar Conductivity, Kohlrausch's law
Faraday's Law of Electrolysis.
Galvanic Cell, Electrode Potential, Measurement of Electrode Potential SHE (Standard Hydrogenelectrode), EMF, Electrochemical Series, Nernst Equation for Electrode Potential
Batteries, Primary Cells-Dry cell, Secondary cell-Lead storage battery, Fuel cells
Unit-7. Solid State
General characteristics of solid state, crystalline and amorphous solid.
Classification of crystalline solid- Molecular, ionic, metallic, covalent solids.
Crystal lattice and unit cells Primitive, BCC, FCC
Imperfections of solid, Magnetic properties- Ferromagnetism, Para Magnetism, diamagnetism, anti-ferromagnetism Melting point determination of crystalline solid by Kjeldahl method.
Unit-8. States of Matter
General Introduction- Comparison of the characteristics of solid, liquid and gases.
Gas Laws- Boyle's Law, Charles' Law, Avogadro Law, Ideal Gas Equation, Universal Gas Constant.
Kinetic Theory of Gases, Ideal and Real Gas
Surface tension and viscosity and their determination
Unit-9. Chemical Equilibrium
Introduction- Equilibria in chemical processes, reversible reaction, irreversible reaction.
Characteristics of chemical equilibrium, Law of mass action, Relation between Kp and Ks
Factors affecting equilibrium, Le-Chatelier's Principle, Effect of change in concentration, pressure, and temperature on equilibrium
Concepts of acids and bases (Bronsted-Lowry and Lewis Concept), lonic product of water
Hydrogen ion concentration, pH scale, Simple numerical problems on pH and POH
Unit 10. Chemical Kinetics
General introduction, Classification of reaction on the basis of Rate.
Rate of reaction, Order of reaction, Molecularity of a reaction: Zero order, First order, Secondorder reactions.
Derivation of rate constant for zero, first, and second order reactions.
Half-life period of a reaction, Units of Rate constant. Effect of Temperature on Rate constant (Arrhenius equation)
Unit-11. Aliphatic Hydrocarbons
Nomenclature of organic compound.
Types of structural Isomerism-chain, position, functional and metamerism.
Synthesis of Alkane from unsaturated hydrocarbon and alkyl halides, synthesis of alkene fromalkyl halide and Alcohol, synthesis of alkynes from calcium carbide and vicinal di halides.
Chemical properties- halogenation of alkanes, alkenes and alkynes, hydro halogenation of alkenesand alkynes.
Synthesis of Aldehydes and Ketones from oxidation of alcohols and dehydrogenation of alcohols.
Nueleophilic addition reaction of aldehyde and ketone with hydroxyl ion and 2,4- Dinitrophenylhydrazine.
Oxidation of aldehyde and ketones using Tollens' and Fehling's reagentand halo form reaction.
Unit-12. Aromatic Compounds
Nomenclature of substituted benzene.
Concept of Aromaticity.
Synthesis of benzene from decarboxylation of aromatic acids, reduction of phenol.
Chemical properties of benzene- Electrophilic substitution reaction nitration, halogenation. Friedel - Crafts, alkylation.
Synthesis of aromatic amines from nitro benzene and amide (Hoffmann bromide degradation reaction).
Reaction of amines with Benzene sulphonyl chloride and Carbylamines reaction.
Physics :
1. Measurement in engineering and science unit of Physical quantity, SI Units, Accuracy and Precision of instrument, Error in measurement. Absolute error, relative error and percentage error, Basic measuring instrument vernier calipers micrometer screw gauge, Spherometer, ammeter, voltmeter, Wheatstone bridge & Potentiometer with their least count, range, accuracy.
2. Newton's law of motion, Linear momentum & impulse, conservation of linear momentum, Force, Friction, Weight, Tension, Spring force, Normal reaction, Up thrust, Work, Energy & Power, Kinetic energy & Potential energy, Conservation of energy.
Simple concept of circular & rotational motion, centripetal force and centrifugal force, moment of inertia, Torque, angular momentum and its conservation.
3 Elastic and Plastic body, stress and Strain with their types, Hooks Law, young modulus bulk modulus and modulus of rigidity. Simple pendulum and bar-pendulum. Simple harmonic motion, Damped, Forced and resonant vibrations.
Cohesive and adhesive forces. Angle of contact, Shape of Liquid surface in Capillary tube, Capillary rise and radius of capillarity.
Newton's law of viscosity, coefficient of viscosity, Stream line and turbulent flow, Reynolds number, Stocks law and terminal velocity.
4 Concept of heat and temperature, mode of heat transfer, scales of temperature and their relationship expansion of solids and liquids, coefficient of linear, surface and cubical expansion and relation among them, Specific heat, Cp and Cv.
5. Law of reflection of light & refraction of fight, Snell's law, Prism, Mirror formula and Lens formula.
6 Parallel and series combination of capacitor, parallel Plate Capacitor Ohms law
series and parallel combination of resistance, Kirchhoff's law, Heating effect of current, electromagnetic induction, Faraday's law of electromagnetic induction, Lenz's Law.
7. Properties of photon, photoelectric effect, law and characteristics of photoelectric effect, Einstein's photoelectric equation, construction, working and application of photoelectric cell.
Semiconductor, P-type & N-type sermiconductor, P-N Junction diode, Transistor, PNP and NPN transistor.
LASER, Properties of Laser, Spontaneous and stimulated emission, Application of Laser in industry and Medical.
Oplical Fiber, Construction and working principle, Critical angle, total internal reflection, acceptance angle and numerical aperture, Application of optical fiber in industry, Communication, Sensor and medical
MATHEMATICS :
Algebra :
Basic operations and properties of numbers
Solving linear equations and inequalities
Functions and graphs
Polynomial and rational functions
Exponential and logarithmic functions
Systems of equations
Trigonometry :
Trigonometric ratios and functions
Unit circle and circular functions
Graphs of trigonometric functions
Identities and equations
Applications in physics (e.g., wave motion, oscillations)
Calculus :
Limits and continuity
Derivatives rules, applications, and interpretation
Integrals: definite and indefinite integrais, applications to area and volume
Fundamental Theorem of Calculus.
Multivariable calculus basics (partial derivatives, multiple integrals)
Linear Algebra :
Vectors and matrices
Matrix operations and determinants
Systems of linear equations (Gauss elimination)
Eigenvalues and eigenvectors
Applications in quantum mechanics and systems of equations
Differential Equations :
First-order differential equations
Applications to physics leg, moton, decay)
Second-order differential equations
Solutions of differential equations
Statistics and Probability :
Descriptive stansics: mean, median, mode, standard deviation
Propability theory basic concepts, random variables, distributions
Applications in experimental data analysis
Introduction to regression and correlation
Complex Numbers :
Basics of complex numbers
Polar form and De Moivre's Theorem
Coordinate Geometry :
Cartesian coordinate system basics
Distance and Midpoint Formulas
a. Calculating distance and finding midpoints
Slope and Equations of Lines
a. Slope-Intercept, point-slope forms
Polar Coordinates
a. Converting between polar and Cartesian coordinates
Negative Marking : 0.25
| S.No | Subject | No.of Question | Marks |
| 1 | Technical Subject | 100 | 100 |
| Total | 100 | 100 |
Exam Date 2026 : Notified Soon