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Updated 09 October 2026 · Source: CBSE board papers and marking schemes
CBSE board exam FAQ · 31 questions

Chapter weightage & repeated questions: 31 questions answered

Which chapters carry the most marks in each CBSE Class 10 and 12 subject, and where to find the most repeated board questions, calculated from 2022–2026 board papers.

Which chapters carry the most marks in CBSE Class 10 Computer Applications?

Averaged across 4 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 10 Computer Applications are HTML (about 29.5 marks per paper), Networking (about 13.5 marks per paper), Cyber Ethics (about 4.8 marks per paper). Revise these first, but don't skip the rest. Full Class 10 Computer Applications chapter weightage.

What are the most repeated questions in CBSE Class 10 Computer Applications board exams?

Comparing all 113 Class 10 Computer Applications board questions from 2022–2026, BoardPrep found 3 that were asked again, in near-identical form, in a different board year. Most of them come from HTML. See the most repeated questions, with the years they appeared, on the Class 10 Computer Applications page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 10 Maths?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 10 Maths are Trigonometry (about 16.5 marks per paper), Circles (about 8.1 marks per paper), Statistics (about 7.5 marks per paper). Revise these first, but don't skip the rest. Full Class 10 Maths chapter weightage.

What are the most repeated questions in CBSE Class 10 Maths board exams?

Comparing all 329 Class 10 Maths board questions from 2022–2026, BoardPrep found 52 that were asked again, in near-identical form, in a different board year. Most of them come from Circles, Statistics, Coordinate Geometry. See the most repeated questions, with the years they appeared, on the Class 10 Maths page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 10 Maths Basic?

Averaged across 6 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 10 Maths Basic are Trigonometry (about 14.7 marks per paper), Circles (about 8.7 marks per paper), Statistics (about 8.0 marks per paper). Revise these first, but don't skip the rest. Full Class 10 Maths Basic chapter weightage.

What are the most repeated questions in CBSE Class 10 Maths Basic board exams?

Comparing all 253 Class 10 Maths Basic board questions from 2022–2026, BoardPrep found 25 that were asked again, in near-identical form, in a different board year. Most of them come from Polynomials, Circles, Probability. See the most repeated questions, with the years they appeared, on the Class 10 Maths Basic page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 10 Science?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 10 Science are Light – Reflection & Refraction (about 11.2 marks per paper), Electricity (about 9.0 marks per paper), Carbon & its Compounds (about 7.2 marks per paper). Revise these first, but don't skip the rest. Full Class 10 Science chapter weightage.

What are the most repeated questions in CBSE Class 10 Science board exams?

Comparing all 339 Class 10 Science board questions from 2022–2026, BoardPrep found 3 that were asked again, in near-identical form, in a different board year. Most of them come from Light – Reflection & Refraction. See the most repeated questions, with the years they appeared, on the Class 10 Science page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 10 Social Science (SST)?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 10 Social Science (SST) are Geography: Lifelines of Economy (about 7.2 marks per paper), History: Nationalism in India (about 6.9 marks per paper), Political Science: Outcomes of Democracy (about 6.5 marks per paper). Revise these first, but don't skip the rest. Full Class 10 Social Science (SST) chapter weightage.

What are the most repeated questions in CBSE Class 10 Social Science (SST) board exams?

Comparing all 322 Class 10 Social Science (SST) board questions from 2022–2026, BoardPrep found 17 that were asked again, in near-identical form, in a different board year. Most of them come from History: Nationalism in India, Political Science: Federalism, Geography: Water Resources. See the most repeated questions, with the years they appeared, on the Class 10 Social Science (SST) page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Accountancy?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Accountancy are Share Capital (about 16.5 marks per paper), Debentures (about 7.5 marks per paper), Dissolution of Firm (about 7.4 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Accountancy chapter weightage.

What are the most repeated questions in CBSE Class 12 Accountancy board exams?

Comparing all 283 Class 12 Accountancy board questions from 2022–2026, BoardPrep found 39 that were asked again, in near-identical form, in a different board year. Most of them come from Financial Statements of Company, Share Capital, Admission of a Partner. See the most repeated questions, with the years they appeared, on the Class 12 Accountancy page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Biology?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Biology are Molecular Basis of Inheritance (about 11.2 marks per paper), Reproductive Health (about 10.6 marks per paper), Human Health & Disease (about 8.2 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Biology chapter weightage.

Which chapters carry the most marks in CBSE Class 12 Business Studies (BST)?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Business Studies (BST) are Marketing (about 19.9 marks per paper), Planning (about 13.8 marks per paper), Staffing (about 7.0 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Business Studies (BST) chapter weightage.

Which chapters carry the most marks in CBSE Class 12 Chemistry?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Chemistry are Coordination Compounds (about 9.1 marks per paper), Aldehydes, Ketones & Carboxylic Acids (about 8.0 marks per paper), Electrochemistry (about 7.1 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Chemistry chapter weightage.

What are the most repeated questions in CBSE Class 12 Chemistry board exams?

Comparing all 291 Class 12 Chemistry board questions from 2022–2026, BoardPrep found 8 that were asked again, in near-identical form, in a different board year. Most of them come from Chemical Kinetics, Amines, Coordination Compounds. See the most repeated questions, with the years they appeared, on the Class 12 Chemistry page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Computer Science (CS)?

Averaged across 4 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Computer Science (CS) are Python Revision & Functions (about 24.5 marks per paper), Database & SQL (about 21.5 marks per paper), Computer Networks (about 8.8 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Computer Science (CS) chapter weightage.

What are the most repeated questions in CBSE Class 12 Computer Science (CS) board exams?

Comparing all 155 Class 12 Computer Science (CS) board questions from 2022–2026, BoardPrep found 4 that were asked again, in near-identical form, in a different board year. Most of them come from Computer Networks, Python Revision & Functions. See the most repeated questions, with the years they appeared, on the Class 12 Computer Science (CS) page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Economics?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Economics are Indian Economy: Human Capital & Rural Development (about 11.5 marks per paper), Macro: Money & Banking (about 11.1 marks per paper), Macro: National Income (about 7.8 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Economics chapter weightage.

What are the most repeated questions in CBSE Class 12 Economics board exams?

Comparing all 294 Class 12 Economics board questions from 2022–2026, BoardPrep found 4 that were asked again, in near-identical form, in a different board year. Most of them come from Macro: Income Determination, Indian Economy: Employment, Indian Economy: Comparative Development (India, China, Pakistan). See the most repeated questions, with the years they appeared, on the Class 12 Economics page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Geography?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Geography are Transport & Communication (about 15.4 marks per paper), International Trade (about 14.1 marks per paper), Population (about 11.5 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Geography chapter weightage.

What are the most repeated questions in CBSE Class 12 Geography board exams?

Comparing all 258 Class 12 Geography board questions from 2022–2026, BoardPrep found 23 that were asked again, in near-identical form, in a different board year. Most of them come from Population, Transport & Communication, Human Geography: Nature & Scope. See the most repeated questions, with the years they appeared, on the Class 12 Geography page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 History?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 History are Bricks, Beads & Bones (Harappa) (about 6.9 marks per paper), Kings, Farmers & Towns (about 6.9 marks per paper), An Imperial Capital: Vijayanagara (about 6.8 marks per paper). Revise these first, but don't skip the rest. Full Class 12 History chapter weightage.

What are the most repeated questions in CBSE Class 12 History board exams?

Comparing all 291 Class 12 History board questions from 2022–2026, BoardPrep found 8 that were asked again, in near-identical form, in a different board year. Most of them come from Framing the Constitution, Thinkers, Beliefs & Buildings, Through the Eyes of Travellers. See the most repeated questions, with the years they appeared, on the Class 12 History page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Informatics Practices (IP)?

Averaged across 4 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Informatics Practices (IP) are Database Query using SQL (about 23.8 marks per paper), Pandas: Series & DataFrame (about 20.5 marks per paper), Computer Networks (about 11.2 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Informatics Practices (IP) chapter weightage.

What are the most repeated questions in CBSE Class 12 Informatics Practices (IP) board exams?

Comparing all 152 Class 12 Informatics Practices (IP) board questions from 2022–2026, BoardPrep found 5 that were asked again, in near-identical form, in a different board year. Most of them come from Pandas: Series & DataFrame, Computer Networks. See the most repeated questions, with the years they appeared, on the Class 12 Informatics Practices (IP) page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Maths?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Maths are Integrals (about 16.6 marks per paper), Relations & Functions (about 7.5 marks per paper), Probability (about 6.8 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Maths chapter weightage.

What are the most repeated questions in CBSE Class 12 Maths board exams?

Comparing all 329 Class 12 Maths board questions from 2022–2026, BoardPrep found 28 that were asked again, in near-identical form, in a different board year. Most of them come from Linear Programming, Differential Equations, Integrals. See the most repeated questions, with the years they appeared, on the Class 12 Maths page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Physics?

Averaged across 8 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Physics are Moving Charges & Magnetism (about 7.9 marks per paper), Electric Charges & Fields (about 7.5 marks per paper), Semiconductor Electronics (about 7.5 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Physics chapter weightage.

What are the most repeated questions in CBSE Class 12 Physics board exams?

Comparing all 289 Class 12 Physics board questions from 2022–2026, BoardPrep found 8 that were asked again, in near-identical form, in a different board year. Most of them come from Semiconductor Electronics, Dual Nature of Radiation & Matter, Moving Charges & Magnetism. See the most repeated questions, with the years they appeared, on the Class 12 Physics page, or practise them free in the app.

Which chapters carry the most marks in CBSE Class 12 Psychology?

Averaged across 4 CBSE board papers from 2023–2026, the highest-weightage chapters in Class 12 Psychology are Psychological Disorders (about 14.2 marks per paper), Self & Personality (about 13.0 marks per paper), Meeting Life Challenges (about 12.0 marks per paper). Revise these first, but don't skip the rest. Full Class 12 Psychology chapter weightage.

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