OSSC CHSL Syllabus 2025 | Prelims & Mains Exam Pattern (PDF Download)

If you’re preparing for the OSSC Combined Higher Secondary Level (CHSL) exam, then understanding the latest syllabus is the first step to cracking it. In this detailed article, you’ll get the OSSC CHSL syllabus 2025 with subject-wise topics, marks, post-wise specializations, preparation tips, and a free PDF download link .

The Odisha Staff Selection Commission (OSSC) conducts the Combined Higher Secondary Level (CHSL) examination to recruit candidates for Group B & C posts such as:

• Revenue Inspector (RI)
• Amin
• Assistant Revenue Inspector (ARI)
• Junior Clerk
• Junior Assistant

Candidates who have passed 10+2 from a recognized board can apply for this examination.

OSSC CHSL 2025 Exam Overview

Component	Details
Exam Name	OSSC Combined Higher Secondary Level
Conducting Body	Odisha Staff Selection Commission (OSSC)
Posts	Amin, RI, ARI, Junior Clerk, Junior Assistant, etc.
Qualification	10+2 (CHSE or equivalent)
Selection Process	Preliminary, Mains, Skill Test (if applicable)
Job Type	State Government (Group B & C)
Official Website	www.ossc.gov.in

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OSSC CHSL Exam Pattern 2025

The Odisha Staff Selection Commission (OSSC) conducts the Combined Higher Secondary Level (CHSL) recruitment examination for various Group C posts like Junior Clerk, Junior Assistant, RI, Amin, ARI, etc.

Stage	Type	Details
Preliminary Examination	Objective (MCQs)	Total Marks: 100, Duration: 90 minutes, Qualifying in nature
Main Written Examination	Descriptive + Objective Type	Two Papers: Paper I (Language), Paper II (General Studies/Technical)
Skill Test (if applicable)	Practical	Typing/Computer Proficiency for clerical posts only

OSSC CHSL Prelims Syllabus 2025

General Awareness

Topic	Description
History	Ancient, Medieval, Modern Indian History, Odisha History
Geography	Physical & Political Geography of India & Odisha
Polity	Indian Constitution, Parliament, Governance structure
Economy	Indian Economy, Banking, Budget, Economic Reforms
Current Affairs	Events of national, international, and Odisha importance
Science	Everyday Science (Physics, Chemistry, Biology basics)
Environment	Biodiversity, Climate Change, Environmental Policies

Arithmetic

Topic	Description
Number System	LCM, HCF, Integers, Fractions
Profit & Loss	SP, CP, Profit %, Discount Calculations
Percentage	Percentage change, conversion, applications
Time & Work	Work efficiency, man-hours based problems
Time & Distance	Train problems, speed-distance-time applications
Average	Simple and weighted averages
SI & CI	Simple Interest, Compound Interest formulas

General English

Topic	Description
Synonyms/Antonyms	Vocabulary-based word meanings
Grammar	Tenses, Prepositions, Articles, Subject-Verb Agreement
Sentence Correction	Spotting grammatical errors
Fill in the Blanks	Grammar-based sentence completion
Voice & Narration	Direct-Indirect speech, Active-Passive voice
Comprehension	MCQ-based reading passage questions

OSSC CHSL Mains Syllabus 2025 – Paper I (Language Test)

This paper tests English and Odia language proficiency in a descriptive format.

English Language

Topic	Description
Essay Writing	Writing essays on current, national, or social issues
Precis Writing	Summarizing a paragraph concisely
Letter Writing	Formal letters, applications, official formats
Grammar	Sentence correction, fill-in-the-blanks, punctuation
Translation	Translation of Odia passage into English

Odia Language

Topic	Description
Essay Writing	Topics related to Odisha culture, events, social aspects
Grammar	Sandhi, Samasa, Taddhita, Alankara
Comprehension	Reading passage followed by Odia-based Q&A
Translation	Translation of English passage into Odia

OSSC CHSL Mains Syllabus 2025 – Paper II (General Studies & Technical)

General Studies

Topic	Description
Constitution	Fundamental Rights, Duties, Amendments, Preamble
History	Indian Independence movement, Odisha freedom struggle
Geography	Indian rivers, forests, crops, soils
Science	Basic science used in daily life
Current Affairs	Recent events from Odisha, India, international level
Environment	Wildlife conservation, climate issues, forest laws
Reasoning	Verbal and non-verbal reasoning, analogy, odd one out

Arithmetic (Advanced Level)

Topic	Description
Algebra	Algebraic identities, linear & quadratic equations
Mensuration	Area, volume, surface area of 2D and 3D shapes
Trigonometry	Height & distance problems, trigonometric ratios
Data Interpretation	Analysis of data in tables, charts, graphs
Number Series	Finding patterns in numeric sequences

Computer Knowledge

Topic	Description
MS Office	Word, Excel, PowerPoint usage
Email	Basic email usage, sending attachments
Internet	Browsing, downloading, bookmarks
Operating System	Basic Windows operations
Cybersecurity	Awareness about viruses, phishing, safe browsing

Technical Subjects (Only for RI, Amin, ARI, etc.)

Topic	Description
Surveying	Basics of Chain, Compass, Plane table, Theodolite surveying
Land Revenue Laws	Odisha-specific land laws, reforms, revenue codes
Settlement & Records	Record of rights (ROR), mutation, khatian, revenue documentation
Field Measurement	Calculation of land area, plots, measurement tools & techniques

Typing Test

Component	Description
Typing Speed	30 WPM (English)
Accuracy	Minimum error tolerance allowed

Computer Test

Task	Description
MS Word	Typing and formatting documents
Excel	Creating tables, using formulas
Internet	Basic browsing and search
Email	Composing, replying, attachments

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OSSC CHSL Syllabus PDF Download

Click here to download OSSC CHSL Syllabus 2025 PDF

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Best Books for OSSC CHSL 2025

Subject	Book	Publisher/Author
General Awareness	Lucent GK	Lucent
Arithmetic	Quantitative Aptitude	R.S. Aggarwal
English	Objective General English	S.P. Bakshi (Arihant)
Odia	General Odia Grammar	P.K. Swain
Computer	Objective Computer Awareness	Arihant Experts
Odisha GK	Odisha General Knowledge	RPH Editorial

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Preparation Tips for OSSC CHSL Exam

• Understand the Syllabus: Go through each topic and sub-topic mentioned above.
• Follow a Study Schedule: Allocate time daily for each subject.
• Practice Mock Tests: Attempt OSSC CHSL previous year papers and full-length mocks.
• Focus on Weak Areas: Analyze your mock test performance and improve where needed.
• Stay Updated with Current Affairs: Follow Odisha current events and national updates.
• Improve Typing/Computer Skills: For clerical posts, practice typing and MS Office.

Specialization Based on Posts

Post Name	Specialization Focus
Junior Clerk/Asst	Language, Computer, Typing Skills
RI (Revenue Insp.)	Surveying, Revenue Law, Field Measurement
ARI	Land Records, Odisha Land Law
Amin	Measurement, Khatian, Settlement Records

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Conclusion

The OSSC CHSL Exam 2025 requires a well-planned strategy, consistent preparation, and clarity over each topic as per the official syllabus. From General Awareness to Technical Papers, each section is crucial in securing your selection. Download the PDF syllabus, stick to recommended books, and begin your focused preparation today!

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