In short: JAC Class 10 (Matric) 2027 papers carry 80 theory marks + 20 internal marks per subject. Each paper has an objective MCQ section (OMR sheet) and a subjective section. Maths, Science and Social Science follow the rationalised NCERT syllabus. This guide covers all six main subjects in one place: Maths, Science, Social Science, Hindi, English and Sanskrit. For each one you get unit-wise marks, top chapters, and how marks split between objective and subjective questions. Estimates come from recent JAC papers and model papers. Confirm final numbers in the official 2027 JAC model paper.
JAC Class 10 at a Glance
| Detail | Information |
|---|---|
| Board | Jharkhand Academic Council (JAC), Ranchi |
| Theory / Internal | 80 / 20 per subject |
| Paper format | Objective (OMR MCQ) + subjective (answer booklet) |
| Duration | 3 hours + reading time |
| Pass marks | 33% per subject |
| Syllabus | Rationalised NCERT (Maths, Science, SST) + JAC language textbooks |
| Exam window | February 2027 (expected) |
| Official site | jac.jharkhand.gov.in |
Rationalised syllabus reminder: Several topics were removed from NCERT Class 10, for example Constructions (Maths), Periodic Classification and Sources of Energy (Science), and Nationalism in Indo-China (History). Do not waste time on removed chapters. Check the JAC 2026-27 syllabus PDF to be sure.
Subject Summary — Where the Marks Are
| Subject | Biggest Unit | Approx Marks (of 80) | Share |
|---|---|---|---|
| Maths | Algebra | 20-22 | ~26% |
| Science | Physics (Light + Electricity + Magnetism) | 24-27 | ~32% |
| Social Science | 4 parts roughly equal | ~20 each | 25% each |
| Hindi | Grammar + Writing | 35-40 | ~47% |
| English | Writing + Grammar | 30-35 | ~40% |
| Sanskrit | Grammar + Textbook | 50-55 | ~65% |
Mathematics (80 Marks)
| Unit | Chapters | Approx Marks |
|---|---|---|
| Number Systems | Real Numbers | 6 |
| Algebra | Polynomials, Linear Equations, Quadratic Equations, AP | 20-22 |
| Coordinate Geometry | Coordinate Geometry | 6 |
| Geometry | Triangles, Circles | 14-15 |
| Trigonometry | Intro to Trigonometry, Applications | 12 |
| Mensuration | Areas Related to Circles, Surface Areas and Volumes | 10 |
| Statistics and Probability | Statistics, Probability | 10-11 |
| Total | 14 chapters | 80 |
Top 5 chapters: Quadratic Equations, AP, Triangles, Trigonometry (both chapters), Statistics. Together they make up roughly 40-45 marks.
Objective vs subjective: MCQs test formulas and quick calculations (discriminant, nth term, distance formula, trig values). Subjective questions test word problems, proofs (BPT, tangent theorems, irrationality) and height-and-distance.
Science (80 Marks)
| Part | Chapters | Approx Marks |
|---|---|---|
| Chemistry | Chemical Reactions and Equations; Acids, Bases and Salts; Metals and Non-metals; Carbon and its Compounds | 24-26 |
| Physics | Light (Reflection and Refraction); Human Eye; Electricity; Magnetic Effects of Current | 24-27 |
| Biology | Life Processes; Control and Coordination; How Do Organisms Reproduce; Heredity; Our Environment | 27-30 |
| Total | 13 chapters | 80 |
Top chapters by marks:
| Chapter | Approx Marks | Why |
|---|---|---|
| Life Processes | 8-10 | Longest chapter, diagrams (digestive system, heart, nephron) |
| Electricity | 7-8 | Numericals on Ohm's law, series/parallel, heating effect |
| Light | 7-8 | Mirror/lens formula numericals + ray diagrams |
| Carbon and its Compounds | 6-7 | Nomenclature, functional groups, reactions |
| Chemical Reactions | 5-6 | Balancing, types of reactions |
| Acids, Bases and Salts | 5-6 | pH, important salts (baking soda, bleaching powder) |
Objective vs subjective: MCQs come heavily from NCERT definitions, formulas, uses of compounds and "which is correct" type statements. Subjective marks come from numericals, diagrams and "explain with example" questions.
Practice any chapter on Padhaao
AI tutor for CBSE, ICSE & 15 state boards · 10 learning modes · 3 free chapters daily
Social Science (80 Marks)
| Part | Key Chapters | Approx Marks |
|---|---|---|
| History | Rise of Nationalism in Europe; Nationalism in India; Making of a Global World; Age of Industrialisation; Print Culture | ~20 |
| Geography | Resources and Development; Water Resources; Agriculture; Minerals and Energy; Manufacturing; Lifelines | ~20 (incl. map) |
| Political Science | Power Sharing; Federalism; Gender, Religion and Caste; Political Parties; Outcomes of Democracy | ~20 |
| Economics | Development; Sectors; Money and Credit; Globalisation; Consumer Rights | ~20 |
| Total | 80 |
Top chapters: Nationalism in India (8-10), Resources and Development, Agriculture, Minerals and Energy, Federalism, Sectors of the Indian Economy, Money and Credit.
Jharkhand advantage: Minerals and Energy Resources and Manufacturing Industries connect to Jharkhand's coal (Jharia, Bokaro), iron ore and steel plants (Jamshedpur, Bokaro). These are high-recall topics for local students, so use them for easy marks.
Map work: Expect 4-5 marks of map questions. Practise locating dams, coalfields, iron-steel plants, ports and places from the national movement (Champaran, Kheda, Dandi, Amritsar).
Hindi (80 Marks)
| Section | Content | Approx Marks |
|---|---|---|
| Apathit (unseen) | Unseen prose / poetry passage | 8-10 |
| Vyakaran (grammar) | Sandhi, Samas, Upsarg-Pratyay, Muhavare, Vachya, Ras/Alankar, Vakya bhed | 15-18 |
| Rachna (writing) | Nibandh, Patra, Suchna / Vigyapan | 18-20 |
| Gadya (prose) | Textbook prose: author, context, questions | 14-16 |
| Padya (poetry) | Textbook poetry: explanation with context, theme | 14-16 |
| Total | 80 |
Strategy: Grammar + writing = nearly half the paper. These are skill-based, so daily practice gives near-full marks. Learn nibandh and patra formats exactly, with the date, address and subject line placed correctly.
English (80 Marks)
| Section | Content | Approx Marks |
|---|---|---|
| Reading | Unseen passages (factual + discursive) | 15-20 |
| Writing | Letter, paragraph / essay, notice / message | 15-18 |
| Grammar | Tenses, voice, narration, articles, prepositions, editing | 15-18 |
| Literature | First Flight prose and poetry, Footprints Without Feet | 25-30 |
| Total | 80 |
Strategy: Hindi-medium students can score well in English by locking in grammar and writing formats. For literature, prepare 3-4 line summaries of every lesson and poem. Most MCQs and short answers ask about characters, themes and events.
Sanskrit (80 Marks)
| Section | Content | Approx Marks |
|---|---|---|
| Apathit | Unseen Sanskrit passage | 8-10 |
| Rachna | Letter / sentence making / picture description | 8-10 |
| Vyakaran | Sandhi, Samas, Pratyay, Shabd-roop, Dhatu-roop, Karak, Avyay | 25-30 |
| Pathya-pustak | Textbook lessons: questions, translation, meaning | 25-30 |
| Total | 80 |
Strategy: Sanskrit is one of the most scoring JAC papers because grammar is rule-based. Memorise the shabd-roop and dhatu-roop tables (rama, lata, phal, path, bhu) and the common pratyays. Many students score 75+.
Priority Matrix — Study Order
| Priority | What | Subjects |
|---|---|---|
| 🔴 First (Nov) | Highest-mark chapters needing practice | Maths Algebra + Trigonometry; Science Electricity, Light, Life Processes |
| 🟠 Second (Dec) | Medium chapters + all diagrams | Geometry, Statistics; Chemistry chapters; SST Nationalism, Resources |
| 🟡 Third (Jan) | Language grammar + writing formats, full SST | Hindi, English, Sanskrit grammar; all SST chapters + maps |
| ⚪ Final (Feb) | OMR MCQ drills + full model papers | All subjects |
Objective Section — How to Score Full Marks
- NCERT line reading: Most JAC MCQs come straight from NCERT sentences, tables and in-text questions.
- Chapter-wise MCQ banks: Solve 30+ MCQs per chapter for Maths, Science and SST.
- OMR speed: Practise filling bubbles on a printed OMR sheet. Fill each bubble completely with a blue/black ballpoint pen.
- Attempt everything: JAC has generally had no negative marking, so never leave an MCQ blank.
Frequently Asked Questions
What is the JAC Class 10 marks distribution for 2027?
Each main subject carries 100 marks: 80 for the theory paper and 20 for internal assessment. The theory paper has an objective MCQ section (OMR) and a subjective section. The exact objective share varies by subject, so check the official 2027 JAC model paper.
Which chapters carry the most marks in JAC Class 10 Maths?
Algebra is the largest unit (about 20-22 marks), led by Quadratic Equations and Arithmetic Progressions. Triangles, Trigonometry and Statistics are also high-mark chapters. Together the top five chapters cover around half the paper.
Is the JAC syllabus reduced for 2027?
JAC follows the rationalised NCERT syllabus for Maths, Science and Social Science. Topics like Constructions, Periodic Classification, Sources of Energy and Nationalism in Indo-China are not part of the current NCERT books. Always confirm with the JAC 2026-27 syllabus PDF on jac.jharkhand.gov.in.
Which is the most scoring subject in JAC Class 10?
Sanskrit and Maths are typically the most scoring because answers are rule-based and objective. Hindi grammar and writing sections also allow near-full marks with practice. Science numericals and diagrams are scoring when practised regularly.
How are internal assessment marks given in JAC?
The school awards the 20 internal marks through periodic tests, projects, assignments and practical/activity work during the year. Regular attendance and timely submission usually secure most of these marks.
Where is the detailed JAC weightage with important questions?
For Maths, Science and SST weightage combined with important questions, see our JAC Class 10 Complete Guide. For Hindi-medium important questions, see JAC Class 10 Important Questions Hindi.
Related Guides
JAC Class 10 Complete Guide + Weightage | JAC Model Paper 2027 | JAC Maths Important Hindi | JAC Science Important Hindi | JAC Date Sheet 2027
Practice JAC Class 10 on Padhaao
Padhaao has NCERT-aligned Class 10 chapters for Maths, Science and Social Science. Start with the high-weightage chapters. Quiz Mode gives you OMR-style MCQs, and Key Points mode is built for quick revision.
3 free chapters every day.
₹21/mo (annual plan)
Padhaao covers 17,000+ chapters across 17 boards
Your exact syllabus. 10 learning modes. 3 free daily. Pro for unlimited - ₹21/month (annual plan).
Want the full chapter with solved examples?
10 learning modes. Board-specific content. 3 free chapters every day.
Try it free