The OSSC CHSL 2026 recruitment is a gateway for thousands of Odisha graduates seeking stable government jobs in various departments like revenue, soil conservation, and more. With the preliminary exam expected in the coming months, understanding the syllabus and exam patterns is crucial for aspirants aiming to clear both stages and secure positions such as Amin, Caretaker, or Soil Conservation Extension Worker.
This comprehensive guide covers the detailed OSSC CHSL syllabus 2026, including prelims and mains patterns, key topics, and proven preparation strategies. Whether you're a first-time applicant or revisiting the process, these insights will help you build a strong foundation and boost your chances of success in this competitive exam.
Read Also: OSSC CHSL Recruitment 2026 Apply Online
Quick Overview of OSSC CHSL 2026 Exam
This snapshot gives you an instant look at the essentials of the Odisha Staff Selection Commission Combined Higher Secondary Level exam.
Conducted annually, it targets 12th-pass candidates for entry-level Group C posts across Odisha government sectors.
| Recruiting Body | Odisha Staff Selection Commission (OSSC) |
|---|---|
| Exam Name | Group C - Combined Higher Secondary Level (CHSL) Exam 2025-2026 |
| Total Posts | 124 |
| Application Status | Active |
| Application Mode | Online via ossc.gov.in |
| Who Should Apply | 12th pass candidates aged 21-38 years (relaxations apply) |
| Job Location | Various districts in Odisha |
| Official Website | www.ossc.gov.in |
Important Dates
- Notification Release Date: December 2025
- Apply Online Date: 06 March 2026
- Apply Online Last Date: 05 April 2026
- Application Submission Last Date: 08 April 2026
- Last Date to Editing online application form: 11 April 2026
- Prellims Admit Card date: June 2026 (Expected)
- Prellims Exam Date: June 2026 (Expected)
- Prellims Result date: July 2026 (Expected)
- Main Exam Admit Card Release date: August 2026 (Expected)
- Main Exam date: August 2026 (Expected)
- Main Result date: September 2026 (Expected)
OSSC CHSL 2026 Exam Pattern
Grasping the exam pattern is the first step to strategizing your study time effectively for both preliminary and main stages.
The prelims is a screening test, while mains are post-specific and more in-depth, ensuring only well-prepared candidates advance.
Preliminary Exam Pattern
| Subject | No. of Questions | Marks | Duration |
|---|---|---|---|
| Mathematics/Quantitative Aptitude | 50 | 50 | 1 Hour (Total) |
| Logical Reasoning | 50 | 50 | |
| English Language | 50 | 50 | |
| Current Affairs & General Knowledge | 50 | 50 | |
| Total | 200 | 200 | 1 Hour |
Note: Objective MCQs with 0.25 negative marking for wrong answers. Qualifying in nature.
Main Exam Pattern
The mains consist of subject-specific papers (200 marks each) depending on the post applied for, such as technical knowledge for Soil Conservation roles.
| Paper | Subjects/Topics | Marks | Duration |
|---|---|---|---|
| Paper I | General Studies + Post-Specific Knowledge | 200 | 2 Hours |
| Paper II (if applicable) | Skill Test or Descriptive | 100 | 1 Hour |
OSSC CHSL Syllabus 2026 for Preliminary Exam
The prelims syllabus focuses on foundational skills tested through multiple-choice questions to filter candidates efficiently.
Covering core areas like math and reasoning, it ensures a balanced assessment of analytical and awareness abilities.
- Mathematics/Quantitative Aptitude: Number systems, simplification, ratios, percentages, profit & loss, time & work, mensuration, simple & compound interest, averages, data interpretation.
- Logical Reasoning: Series, analogies, coding-decoding, blood relations, directions, syllogisms, puzzles, seating arrangements, non-verbal reasoning.
- English Language: Grammar (tenses, articles, prepositions), vocabulary (synonyms, antonyms), comprehension, error spotting, sentence improvement, fill in the blanks.
- Current Affairs & General Knowledge: National/international events, Odisha-specific history/geography, polity, economy, science basics, sports, awards, books & authors.
OSSC CHSL Mains Syllabus 2026
Mains syllabus dives deeper into post-relevant subjects, requiring specialized knowledge alongside general studies.
For roles like Amin or Caretaker, expect emphasis on practical applications in Odisha's administrative and technical contexts.
Syllabus for Amin Post - Technical Paper for Main Written Examination
This section details the geometry, mensuration, and map interpretation topics essential for the Amin role in land measurement and surveying.
- Concepts of Geometry & Mensuration
- 2D Shapes: Line, Circle, Triangle, Quadrilateral, Rectangle, Square, Trapezium, Rhombus and Parallelogram
- 3D Shapes: Sphere, Hemi-Sphere, Cylinder, Cone, Cube, Pyramid, Cuboid
- Important Theorems and Postulates
- Triangles: Different types of Triangles
- Various types of Centres
- Congruence
- Similarity and Area
- Quadrilaterals: Different types of Quadrilaterals i.e. Rectangle, Square, Trapezium, Rhombus and Parallelogram
- Perimeter and Area
- Circle: Perimeter and Area
- Radius, Diameter, Secant, Sector and Chords
- Tangents
- Area tracing by using Coordinate Geometry
- Height and Distance calculation by using Trigonometric formulae
- Volume, Curved Surface Area (CSA), Lateral Surface Area (LSA), Total Surface Area (TSA) of 3D objects i.e. Sphere, Hemi-Sphere, Cylinder, Cone, Cube, Pyramid, Cuboid
- Units of area Measurement and their conversion
- Interpretation of Maps
- Introduction to Maps
- Map Scale and Ratio
- Coordinates: Latitudes, Longitudes
- Types of Maps: Political maps, Physical maps, Topographical maps, Topological maps, Nautical maps, Thematic maps and Road maps
- Properties of Maps: Distance, Symbol and Direction
- Conventional Signs and symbols
- Interpretation of Topo-Sheets
- Index in maps
Syllabus for Junior Assistant Post - Technical Paper for Main Written Examination
This covers foundational science topics in physics, chemistry, and biology, vital for administrative support roles in Odisha departments.
Physics
- Unit I: Motion: Uniform and non-uniform motion, Velocity, Acceleration, Distance-Time graph, Speed-Time graph, Laws of circular motion
- Unit II: Force and Laws of Motion: Momentum and unbalanced force, Newton's Laws of Motion, Inertia and Mass, Conservation of Momentum
- Unit III: Gravitation: Universal Law of Gravitation, Free fall, Mass, Weight, Thrust and Pressure in Fluids
- Unit IV: Work and Energy: Work, Kinetic Energy, Potential Energy, Relative density
- Unit V: Sound: Propagation of Sound, Characteristics of sound wave, Speed of sound in different medium
- Unit VI: Light - Reflection and Refraction: Reflection of light, Types of Mirror and Lens formula, Magnification, Power of Lens
- Unit VII: Thermodynamics: Thermal equilibrium, definition of temperature (Zeroth law of thermodynamics), Heat, Work and internal energy
- Unit VIII: Electricity and Magnetism: Electric Current, Electric potential and potential difference, Circuit diagram, Ohm's law
Chemistry
- Unit I: Matter: Characteristics of particles of matter, States of Matter, Evaporation, Sublimation and its mixtures, Colloidal solution, Properties of colloidal solution
- Unit II: Atoms and Molecules: Dalton's atomic theory, Atoms, Laws of conservation of mass, Molecules, Ionic compounds, Valency
- Unit III: Structure of Atom: Rutherford's model of atom, Drawbacks of Rutherford's model of atom, Bohr's model
- Unit IV: Chemical reactions and Equations: Isotopes, Isobars, Double displacement reaction, Oxidation chemical reaction, Types of chemical preventive reactions, Double displacement
- Unit V: Acids, Bases and Salts: pH, Family of salts, Sodium Hydroxide, Bleaching powder
- Unit VI: Metals and Non-metals: Physical properties of Metals, Reactivity of Non-metals, Properties of iconic compounds
- Unit VII: Carbon and its Compounds: Types of Bonding, Allotropes of Carbon, Versatile nature of Carbon chains, Branches of chemical
- Biology 1st Year (Theory)
- Unit I: Diversity in living world
- Unit II: Structural organization in animals and plants
- Unit III: Cell structure and function
- Unit IV: Plant physiology
- Unit V: Human physiology
- Biology 2nd Year (Theory)
- Unit I: Reproduction and Evolution
- Unit II: Biology and Human Welfare
- Unit III: Biotechnology and its applications
- Unit IV: Ecology and environment
Biology (Additional Units)
- Unit I: Biodiversity: Classification of Plant, Animal, Living kingdom, Hierarchy of classification, Five kingdom classification, Plantae, Animalia, Vertebrata, Extinct species, Endangered species
- Unit II: Cell and its Structure: Cell and its Structure, Plasma membrane, Nucleus, Chromosome
- Unit III: Tissue System: Types of animal tissue, Connective tissue, Muscular tissue, Nervous tissue, Animal tissue, Types of animal tissue
- Unit IV: Nutrition: Nutrition classification, Photosynthesis, Digestive System of Man
- Unit V: Respiration
- Unit VI: Transportation in Human and Plant: Transport in Plants, Transport in the Human Body
- Unit VII: Excretory System: Structure and function, Mechanism of Urine formation
- Unit VIII: Control and Co-ordination: Plant control and co-ordination, Human control and co-ordination, Human chemical
- Unit IX: Reproduction: Type of Reproduction and details of human, Plant cell (Human and Plant cell), Division (Type and details), Parenchyma System (Type and details of living organism), Male Reproductive System and details, Female Reproductive System of living organism transmitted diseases
- Unit X: Heredity and Women's Health: Heredity, Mendel's Hybridisation System, Sex Determination, Darwin's Theory, Details on evolution, Sources of Energy
- Unit XI: Sources of Energy: Type of energy, Source of energy, Renewable Energy type and work, Renewable non-eligible
- Unit XII: Environment: Biosphere, Ecosystem, Structure of nutrient components of Ecosystem, Function of homeostasis of Ecosystem problems, Ecological Pyramid, Nutrient cycle, Biomassification, Homeostasis, Environmental problems, Natural Resources, Natural Resources of Natural conservation, Techniques of conservation, Natural Resources importance and Forest and Wildlife, Technology of conservation and Plant and Natural conservation, Watershed Management, Rainwater Harvest, Water Recycle, Water
- Unit I: Computer Fundamentals: Computer Literacy and uses of the computer: What is a computer? Input-Output devices, Types of software, Hardware (Digital, Analog, Hybrid, Supercomputer, Memory (Mainframe, Mini, Virtual book, and Computer Languages, Basic knowledge of MS-Word, MS-Excel, and MS-PowerPoint. Introduction to the Internet, net browsing, Emails, saving, and printing web files
Syllabus for Junior Fisheries Technical Assistant Post - Technical Paper for Main Written Examination
This syllabus emphasizes practical fisheries knowledge, aquaculture techniques, and supporting chemistry for Odisha's inland water resources.
- Part 1: Introduction to Inland Fisheries
- Unit I: Introduction to Inland Fisheries, present status (global, India), context (types of fisheries: freshwater, brackish water, estuarine, riverine, reservoir, lakes, etc.)
- Unit II: Inland Fisheries Resources: Freshwater resources, Riverine resources, reservoirs, lakes, estuaries, wetlands, ponds, tanks and inland brackish water resources of Odisha, lakes, lagoons
- Unit III: Species contributing to inland fisheries: A general account of economically important fish, identification, food and feeding habits, growth, reproduction and migration characters
- Unit IV: Fisheries of reservoirs and lakes, conservation of fish stocks, stocking with fish culture and their exploitation, Floodplain wetlands as capture fishery resources of Chilika lake and Ansupa
- Unit V: Cold water fisheries status, important species, cold water fishery resource management
- Unit VI: Fishing devices, common inland fishery crafts and their usefulness, operation
- Part 2: Introduction to Aquaculture
- Unit I: History of aquaculture, present global and national scenario, principles of culture, comparative advantages, monoculture, polyculture, integrated aquaculture, cage culture, fed-integrated, waste water, criteria for site selection for traditional/extensive, semi-intensive, intensive aquaculture in inland water bodies
- Unit II: Design and construction of fish farm, Soil types, properties, classification, sampling, methods of texture analysis, design of seepage and their control, location, design
- Unit III: Freshwater pond hatchery and management, control of aquatic weeds, liming, fertilization/manuring, use of bio-fertilizers, stocking
- Unit IV: Layout and construction of farm, Soil types, properties, classification, growth, sampling, methods of texture analysis, effects of seepage and their control, location, design
- Unit V: Freshwater aquaculture resources- ponds, tanks, lakes and reservoirs, nursery, rearing and grow-out ponds, control of algal blooms, liming and fertilization/manuring, control of aquatic weeds, stocking and seed supply to fishes, pond environment management, fish management, harvesting
- Unit VI: Brackish water aquaculture, important finfish culture, seed stocking and culture practices
- Unit VII: Marine cage culture, important species for culture, seed collection, stocking, culture practices
- Unit VIII: Ornamental fish culture, important indigenous and exotic ornamental fishes, integrated modular and culture practices, propagation of live feeds
- Unit IX: Principles of aquaculture, fish cum poultry, fish cum duck and fish cum cattle rearing
- Chemistry
- Unit I: Some Basic Concepts of Chemistry: Atomic and molecular masses, equivalent mass of elements, acid, base and salt, oxidation reduction, formula, mole concept and reactions, molar mass, percentage composition, empirical and stoichiometric expression of concentration of solutions
- Unit II: Atomic Structure: Atomic number, Isotopes, Isobars, Rutherford's model and its limitations, Bohr's model, and its limitations, Broglie's relationships, Heisenberg's uncertainty principle, dual nature of matter and light, quantum numbers, Pauli's exclusion principle and Hund's rule, electronic configuration of atoms
- Unit III: Half-filled and fully filled orbitals and properties: Modern periodic law and the present form of periodic table, periodic trends in properties of elements, electronegativity, electropositivity, ionic radii, valence, inert gas, ionization energy, electron gain enthalpy, Nomenclature of elements with atomic number >100
- Unit IV: Chemical Bonding and Molecular Structure: Covalent bond, ionic bond, valence shell electron pair repulsion (VSEPR) theory, molecular orbital theory, concepts of hybridization, shapes of simple molecules, dipole moment, covalent character of ionic bond, bond angle, bond length, bond energy, Fajans rules, polarization of ions
- Unit V: States of Matter: Gases and Liquids: Role of gas in elucidating the concept of the molecule, Boyle's law, Charles law, Gay Lussac's law, Avogadro's law, Ideal behaviour, deviation from ideal behaviour of gas equation, kinetic energy and molecular speeds (elementary idea)
- Unit VI: Chemical Thermodynamics: Concepts of System and surroundings and types of system, surroundings, work, heat, energy, extensive and intensive properties, state functions, first law of thermodynamics, internal energy, enthalpy of reaction, Hess's law of constant heat summarization, enthalpy of bond dissociation, combustion, formation, atomization, Hess's law of constant heat summarization, enthalpy of sublimation, phase transition, hydration, ionization, solution, dilution, lattice energy
- Unit VII: Equilibrium: Physical and chemical processes, dynamic nature of equilibrium, law of mass action, equilibrium constant, factors affecting equilibrium Le Chatelier's principle, degree of ionic equilibrium, concept of pH, Henderson equation, solubility product, common ion effect, buffer solution, Henderson equation, solubility product, common ion effect, buffer solution
- Unit VIII: Redox Reaction: Concept of oxidation and reduction, redox reactions, oxidation number, balancing redox reactions in terms of loss and gain of electrons and change in oxidation number
- Unit IX: Hydrogen: Position of hydrogen in periodic table, occurrence, isotopes, preparation, properties and uses of hydrogen, water, heavy water and hydrogen peroxide, hydrides, industrial use of hydrogen, hydrogen as a fuel
- Unit X: S-Block Elements (Alkali and Alkaline Earth Metals): Group 1 and Group 2 elements, general introduction, group 1 elements, preparation and properties of sodium compounds, sodium hydroxide, sodium carbonate, industrial uses of lime, cement, plaster of Paris, biological importance of Na, K, Mg, Ca
- Unit XI: Some p-Block Elements: Group 13 Elements: General introduction, electronic configuration, occurrence, variation of properties, oxidation states, trends in chemical reactivity, anomalous behaviour of first element of group, Boron, physical and chemical properties
- Unit XII: Organic Chemistry - Some Basic Principles and Technique: General introduction, classification and IUPAC nomenclature of organic compounds, electronic displacement in a covalent bond, inductive effect, electromeric effect, resonance and hyper conjugation, homolytic and heterolytic fission of a covalent bond, free radicals, carbocations, carbanions, electrophiles and nucleophiles, types of organic reactions
- Unit XIII: Hydrocarbons: Classification of Hydrocarbons: Aliphatic Hydrocarbons: Alkanes - Nomenclature, isomerism, conformation (ethane only), methods of preparation, physical properties, chemical properties (including free radical mechanism of halogenation, combustion and pyrolysis)
Note: Exact mains topics vary by post; check the official notification for your applied category.
OSSC CHSL 2025-2026 Notification PDF Download
Selection Process for OSSC CHSL 2026
The multi-stage process ensures merit-based selection with checks for eligibility and skills.
From prelims to certificate verification, each step builds towards final allotment in Odisha's government departments.
- Preliminary Written Exam: Objective screening test (200 marks).
- Main Written Exam: Post-specific papers (200-300 marks total).
- Certificate Verification: Document check and final merit list preparation.
No interview for most posts; weightage is on written exams.
How to Prepare for OSSC CHSL 2026
A structured preparation plan turns syllabus knowledge into exam success, especially for Odisha-focused topics.
With 3-6 months of dedicated effort, candidates from Bhubaneswar or other districts can aim for top ranks.
- Understand the Pattern: Analyze past papers to spot recurring questions and time management tricks.
- Build Basics: Start with NCERT books for math, English, and GK; supplement with Odisha-specific resources like "Odisha History" by BK Rath.
- Daily Practice: Solve 50-100 questions per subject, focusing on weak areas like quantitative aptitude.
- Mock Tests: Take full-length prelims mocks weekly; review errors to improve accuracy.
- Current Affairs: Read Prameya or Sambad daily; use apps like Adda247 for Odisha news quizzes.
- Health & Revision: Maintain a balanced routine with 7-8 hours sleep; revise weekly with flashcards for GK facts.
OSSC CHSL 2026 Preparation Tips for Prelims and Mains
Tailored tips help bridge the gap between prelims qualifiers and mains toppers in this Odisha-centric exam.
Emphasize speed for prelims and depth for mains to stand out among thousands of applicants.
- For Prelims: Prioritize speed—aim for 80% accuracy in 60 minutes; practice reasoning puzzles daily.
- For Mains: Focus on post-specific notes; write 2-3 essays weekly on Odisha development topics. For technical papers like Amin, practice mensuration problems; for Fisheries, memorize species and aquaculture techniques.
- Common Tips: Join online forums like Odisha Job Alert groups for doubt clearance; track progress with a study journal.
- Resources: Use "OSSC CHSL Guide" by Arihant; free YouTube channels like Odisha Exam Guru for video explanations.
Recommended Books for OSSC CHSL 2026 Preparation
Selecting the right books saves time and ensures comprehensive coverage of the syllabus.
Combine standard references with Odisha-local publications for a competitive edge in regional questions.
| Subject | Recommended Books |
|---|---|
| Quantitative Aptitude | RS Aggarwal Quantitative Aptitude; Fast Track Objective Arithmetic by Rajesh Verma |
| Reasoning | Verbal & Non-Verbal Reasoning by RS Aggarwal; Analytical Reasoning by MK Pandey |
| English | Objective General English by SP Bakshi; High School English Grammar by Wren & Martin |
| General Knowledge | Lucent's General Knowledge; Odisha GK by Tarun Goyal |
| Mains (Post-Specific) | OSSC CHSL Mains Guide by Jet Exam Publication (post-wise); NCERT Physics/Chemistry/Biology for Junior Assistant; "Inland Fisheries" by R.S.V. Pillai for Fisheries Technical |
FAQs on OSSC CHSL Syllabus 2026
Q1: What is the marking scheme for OSSC CHSL prelims?
Answer: 1 mark per correct answer with 0.25 negative marking for wrongs; total 200 marks.
Q2: Is there a descriptive paper in OSSC CHSL mains?
Answer: Yes, for some posts like Amin; others are objective with skill tests.
Q3: How many months should I prepare for OSSC CHSL 2026?
Answer: 3-6 months with 4-6 hours daily study for best results.
Q4: Are Odisha-specific questions important?
Answer: Absolutely—expect 20-30% weightage on Odisha history, geography, and current affairs.
Q5: What is the minimum qualifying marks for prelims?
Answer: Around 40% (varies by category); it's qualifying only.
Q6: Can I choose multiple posts in one application?
Answer: Yes, but mains papers differ; select based on your strengths.
Q7: When is the OSSC CHSL 2026 notification expected?
Answer: Likely by mid-2026; monitor ossc.gov.in for updates.
Q8: Is coaching necessary for OSSC CHSL?
Answer: Not mandatory; self-study with mocks works for disciplined candidates.
Conclusion
Mastering the OSSC CHSL syllabus 2026 requires consistent effort and smart strategies tailored to Odisha's unique exam landscape.
Start today with the prelims basics, gear up for mains specifics, and stay updated via the official site—your government job dream is within reach!