CBSE Class 10 Science — Guess Paper & Important Questions 2027
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Everything for Science in one place — guess paper, important questions and chapter-wise important topics for the 2027 exam, from analysis of 5 board + 2 official sample papers (2022–2026).
Guess Paper 2027
A full 39-question paper on the official pattern, built from the most-likely questions.
Open guess paper PDFImportant Questions
87 question patterns that have repeated across past papers.
See repeated questions PDFImportant Topics
Every chapter’s topics ranked by how often and how recently they were asked.
See important topicsTop 5 topics
| # | Topic | Chapter | Importance |
|---|---|---|---|
| 1 | Image formation by spherical mirrors / ray diagrams | Light - Reflection and Refraction | ★★★★★ |
| 2 | Food chains, food webs and trophic levels / 10% law | Our Environment | ★★★★☆ |
| 3 | Identifying type of reaction (combination/decomposition/displacement/double displacement) | Chemical Reactions and Equations | ★★★★☆ |
| 4 | Nutrition in animals (human digestive system) | Life Processes | ★★★★☆ |
| 5 | Plant hormones and tropic movements | Control and Coordination | ★★★★☆ |
CBSE Class 10 Science exam pattern 2027
Key facts
- Maximum marks: 80
- Duration: 3 hours
- Sections: 3 (A, B, C)
- Exam: 2027 CBSE Class 10 board exam
| Section | What is asked | Marks |
|---|---|---|
| A | Biology + Environment (World of Living 25 + Natural Resources 5 = 30 marks). 16 questions: 7 MCQ, 2 Assertion-Reason, 3 VSA(2m), 2 SA(3m), 1 case study(4m), 1 LA(5m). Internal choice in 1 VSA, the case study, and the LA. | 30 |
| B | Chemistry (Chemical Substances - Nature and Behaviour = 25 marks). 13 questions: 7 MCQ, 1 Assertion-Reason, 1 VSA(2m), 2 SA(3m), 1 case study(4m), 1 LA(5m). Internal choice in 1 SA, the case study, and the LA. | 25 |
| C | Physics (Natural Phenomena 12 + Effects of Current 13 = 25 marks). 10 questions: 2 MCQ, 1 Assertion-Reason, 2 VSA(2m), 3 SA(3m), 1 case study(4m), 1 LA(5m). Internal choice in 1 VSA, the case study, and the LA. | 25 |
CBSE Class 10 Science chapter-wise weightage 2027
| Unit | Chapters | Marks |
|---|---|---|
| Chemical Substances - Nature and Behaviour | Chemical Reactions and Equations, Acids, Bases and Salts, Metals and Non-metals, Carbon and its Compounds | 25 |
| World of Living | Life Processes, Control and Coordination, How do Organisms Reproduce, Heredity | 25 |
| Natural Phenomena | Light - Reflection and Refraction, The Human Eye and the Colourful World | 12 |
| Effects of Current | Electricity, Magnetic Effects of Electric Current | 13 |
| Natural Resources | Our Environment | 5 |
Unit marks as given in the official syllabus.
Frequently asked questions
Is this the real CBSE Class 10 Science guess paper 2027?
No. It is a practice guess paper built by analysing which questions and topics repeat across 5 board + 2 official sample papers (2022–2026) for CBSE Class 10 Science. It follows the latest official exam pattern but is not an official or leaked paper.
What is the CBSE Class 10 Science exam pattern for 2027?
The CBSE Class 10 Science 2027 paper is 80 marks and 3 hours long, in 3 sections: Section A — Biology + Environment (World of Living 25 + Natural Resources 5 = 30 marks); Section B — Chemistry (Chemical Substances - Nature and Behaviour = 25 marks); Section C — Physics (Natural Phenomena 12 + Effects of Current 13 = 25 marks). Highest-weightage units: Chemical Substances - Nature and Behaviour (25 marks), World of Living (25 marks), Effects of Current (13 marks).
How many questions repeat in CBSE Class 10 Science?
We found 87 question patterns that appeared in two or more of the analysed papers (5 board + 2 official sample papers). The most-repeated ones are listed on the Important Questions page.
What are the most important topics for CBSE Class 10 Science 2027?
The top topics by repetition are Image formation by spherical mirrors / ray diagrams; Food chains, food webs and trophic levels / 10% law; Identifying type of reaction (combination/decomposition/displacement/double displacement). The full ranked list is on the Important Topics page.
Where can I see the CBSE Class 10 Science guess paper?
The full 39-question guess paper is on the Guess Paper page — free to view, with each question tagged by chapter and how often it has appeared in past papers.