In short: CGBSE (Chhattisgarh Board of Secondary Education) Class 10 papers carry 75 theory marks + 25 internal/project marks per subject. CGBSE publishes a subject-wise blueprint that fixes how many marks each chapter gets and the question types. This guide lists the most expected Class 10 questions for Maths, Science, Social Science, Hindi and English, chapter by chapter, with short answer hints. Questions come from repeat patterns in recent CGBSE papers. Pair this list with the official blueprint from cgbse.nic.in. For Hindi-medium students, our CGBSE important questions guide in Hindi covers Class 10 and 12.
CGBSE Class 10 Pattern 2027 — Quick Recap
| Item | Details |
|---|---|
| Board | Chhattisgarh Board of Secondary Education (CGBSE / CG Board) |
| Theory | 75 marks |
| Internal / project | 25 marks |
| Duration | 3 hours |
| Question types | Objective (MCQ, fill in the blanks, match the following, one word) + very short, short, long answers |
| Pass marks | 33% per subject |
| Syllabus | NCERT-based (Maths, Science, SST) + state language books |
| Exam window | March 2027 (expected) |
Use the blueprint: The CGBSE blueprint shows how many marks each unit carries and which question types to expect. Download it from cgbse.nic.in and tick off each chapter as you finish the questions below.
Mathematics — Important Questions
Objective (practise these as one-liners)
- HCF × LCM = product of two numbers
- Condition for equal roots: b² − 4ac = 0
- nth term of an AP: aₙ = a + (n − 1)d
- Distance and midpoint formulas
- sin²θ + cos²θ = 1; values of sin, cos and tan at 0°, 30°, 45°, 60°, 90°
- Area of a sector = (θ/360) × πr²
- Probability of a sure event = 1, impossible event = 0
Subjective
| # | Question | Chapter | Hint |
|---|---|---|---|
| 1 | Prove that √2 (or √3, √5) is irrational | Real Numbers | Contradiction with co-prime a/b |
| 2 | Find the zeroes of x² − 2x − 8 and verify the zero-coefficient relationship | Polynomials | Zeroes 4, −2 |
| 3 | Solve a pair of linear equations by elimination/substitution (word problem: ages, fractions, numbers) | Linear Equations | Form two equations first |
| 4 | Solve quadratic word problems (speed-time, area, consecutive numbers) | Quadratic Equations | Form the equation and reject negative roots |
| 5 | Find the sum of the first n terms; find how many terms give a sum | AP | Sₙ = n/2[2a + (n − 1)d] |
| 6 | Prove BPT and use it to find a missing side | Triangles | Areas of triangles method |
| 7 | Prove that tangents from an external point are equal | Circles | Congruent right triangles (RHS) |
| 8 | Section formula; find the ratio in which the x-axis divides a segment | Coordinate Geometry | Put y = 0 |
| 9 | Prove trig identities like (1 − cos²A) cosec²A = 1 | Trigonometry | Convert to sin and cos |
| 10 | Height and distance with two angles of elevation | Applications of Trig | Use tan for both triangles |
| 11 | Volume/surface area of combined solids (cone on hemisphere, cylinder + cone) | Surface Areas and Volumes | Add the parts, avoid double-counting the base |
| 12 | Mean (step deviation) and mode of grouped data | Statistics | Mode = l + [(f₁ − f₀)/(2f₁ − f₀ − f₂)] × h |
| 13 | Probability with cards or dice | Probability | Total outcomes: 52 cards, 36 for two dice |
Science — Important Questions
Chemistry
| # | Question | Hint |
|---|---|---|
| 1 | Balance equations and identify the type of reaction (combination, decomposition, displacement, double displacement, redox) | Write the state symbols too |
| 2 | What is corrosion? How is it prevented? What is rancidity? | Painting, galvanisation; antioxidants, nitrogen packing |
| 3 | Preparation and uses of baking soda, washing soda, bleaching powder and plaster of Paris | Write the equations |
| 4 | pH scale and its importance in daily life (tooth decay, antacids, soil) | pH < 7 acidic, = 7 neutral, > 7 basic |
| 5 | Physical and chemical properties of metals and non-metals; reactivity series | Reactions with oxygen, water, acids |
| 6 | Ionic compounds: formation (NaCl, MgCl₂) and properties | Electron-dot structures |
| 7 | Covalent bonding in carbon; homologous series; IUPAC names | Electron-dot structure of CH₄ |
| 8 | Soaps vs detergents; cleansing action of soap (micelle) | Diagram of a micelle |
Physics
| # | Question | Hint |
|---|---|---|
| 1 | Mirror formula numerical; nature of the image | 1/v + 1/u = 1/f, with sign convention |
| 2 | Ray diagrams for a concave mirror / convex lens (all positions) | Two standard rays |
| 3 | Refraction laws; refractive index; power of a lens | P = 1/f (in metres) |
| 4 | Myopia and hypermetropia with correction diagrams; why the sky is blue | Concave lens / convex lens |
| 5 | Ohm's law with V-I graph; resistivity factors | R = ρl/A |
| 6 | Resistors in series and parallel numericals; heating effect H = I²Rt | Find equivalent R first |
| 7 | Magnetic field lines around a bar magnet / solenoid; Fleming's rules | Draw neat field lines |
| 8 | Electric motor principle (diagram) | Force on a current-carrying conductor |
Biology
| # | Question | Hint |
|---|---|---|
| 1 | Human digestive system with a labelled diagram | Mouth → anus, enzymes at each stage |
| 2 | Photosynthesis: equation, steps, role of stomata | 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ |
| 3 | Human heart structure and double circulation | 4 chambers, valves |
| 4 | Nephron structure and urine formation | Filtration, reabsorption |
| 5 | Reflex arc; human brain parts and functions | Receptor → effector |
| 6 | Plant hormones: auxin, gibberellin, cytokinin, abscisic acid | One function each |
| 7 | Human reproductive systems; contraception methods | Barrier, hormonal, surgical |
| 8 | Mendel's monohybrid cross (3:1) | Punnett square |
| 9 | Food chain, 10% law, ozone depletion | Energy flow arrow |
Diagram list: digestive system, heart, nephron, neuron, brain, stomata, human eye, ray diagrams, electric motor, micelle. Practise each at least 3 times.
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Social Science — Important Questions
| # | Question | Part |
|---|---|---|
| 1 | Explain the role of Giuseppe Mazzini / Bismarck in unification | History (Europe) |
| 2 | Why did Gandhiji launch the Non-Cooperation Movement? Explain its spread in towns and countryside | History (India) |
| 3 | Explain the Salt March and the Civil Disobedience Movement | History (India) |
| 4 | How did print culture help spread nationalism in India? | History |
| 5 | Types of soil in India and soil conservation methods | Geography |
| 6 | Multipurpose river projects: advantages and disadvantages | Geography |
| 7 | Rabi, kharif and zaid crops; major crops and the states that grow them | Geography |
| 8 | Conventional vs non-conventional energy; Chhattisgarh's minerals (coal, iron ore, bauxite) | Geography |
| 9 | Belgium vs Sri Lanka power-sharing models | Political Science |
| 10 | Features of federalism; decentralisation (73rd/74th amendments) | Political Science |
| 11 | Functions of political parties; national vs regional parties | Political Science |
| 12 | Sectors of the economy; organised vs unorganised | Economics |
| 13 | Formal vs informal credit; role of SHGs | Economics |
| 14 | Impact of globalisation; role of MNCs | Economics |
| 15 | Map: Bhilai steel plant, Korba thermal plant, Bailadila iron ore, Hirakud dam | Map work |
Chhattisgarh angle: Bhilai Steel Plant, the Korba coalfield and power plants, and the Bailadila iron ore mines are high-probability map and minerals questions for CG students.
Hindi — Important Questions
| Section | Most Expected |
|---|---|
| Apathit gadyansh / padyansh | Title, central idea, 2-3 short questions |
| Vyakaran | Sandhi-viched, samas-vigraha, upsarg-pratyay, muhavare ka arth evam prayog, vachya parivartan, alankar pehchan |
| Patra lekhan | Formal letter to the principal (leave, fee concession); letter to the editor (cleanliness, water problem) |
| Nibandh | Swachh Bharat, Digital India, Paryavaran Pradushan, Mera Priya Tyohar, Chhattisgarh ki Sanskriti |
| Gadya/Padya | Explanation with context (sandarbh-prasang-vyakhya), author/poet introduction, central idea |
English — Important Questions
| Section | Most Expected |
|---|---|
| Reading | Unseen passage: true/false, word meanings, short answers |
| Writing | Application to the principal; letter to a friend; paragraph on topics like "Importance of Trees" or "Mobile Phones" |
| Grammar | Tense correction, active-passive, direct-indirect, articles, prepositions, transformation |
| Literature | Character sketches, central idea of poems, short answers from the textbook lessons |
How to Use This List — 4-Week Plan
| Week | Focus |
|---|---|
| 1 | Maths Q1-Q13 + Science Physics list |
| 2 | Science Chemistry + Biology lists + all diagrams |
| 3 | SST list + map practice + Hindi grammar |
| 4 | English writing/grammar + one CGBSE model paper per subject |
Write answers by hand. Reading alone is not enough for board exams. After each week, solve the matching sections of an official CGBSE model paper.
Frequently Asked Questions
What is the CGBSE Class 10 marking scheme for 2027?
Each main subject carries 100 marks: 75 for the theory paper and 25 for internal assessment/project work. Theory papers mix objective questions with very short, short and long answers. The blueprint on cgbse.nic.in gives the exact split.
Are CGBSE Class 10 questions from NCERT?
Yes, for Maths, Science and Social Science. CGBSE uses NCERT-based textbooks for these subjects. Hindi, Sanskrit and some language papers use state textbooks. Most important questions repeat NCERT examples and exercises.
Where can I download the CGBSE blueprint?
The official blueprint and model papers are published on cgbse.nic.in, usually under the downloads or examinations section. Your school also receives copies. Use the blueprint to check that your preparation covers every chapter's allotted marks.
Which subject is most scoring in CGBSE Class 10?
Maths and Sanskrit are usually the most scoring because answers are exact. Science is scoring if you practise numericals and diagrams. Hindi grammar and writing sections can fetch near-full marks with daily practice.
How many important questions should I practise per chapter?
For Maths and Science, solve all NCERT exercise questions plus 10-15 extra board-level questions per chapter. For SST, prepare 5-8 long-answer questions per chapter and every map item.
Is there a separate guide for CGBSE model papers?
Yes. See the CGBSE Class 10 Model Paper 2027 for a blueprint-aligned practice paper with solutions.
Related Guides
CGBSE Class 10 Model Paper (Blueprint Aligned) | CGBSE Important Questions Hindi | CGBSE Class 10 Complete Guide | CGBSE Subject-Wise Hindi Guide | CGBSE Date Sheet 2027
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