BIHAR BOARD PREP | APRIL 2026
Bihar Board Class 10 Science sample paper with 20 chapter-wise MCQs covering all important topics — chemical reactions, life processes, electricity, light, and more for BSEB 2027 board exam preparation.
Bihar Board Class 10 Science examination is 100 marks (80 theory + 20 internal). The objective type (MCQ) section contributes significantly to the theory marks. Based on BSEB exam pattern analysis from 2022-2025, objective questions account for 40 out of 80 theory marks (50%). Scoring full marks in the MCQ section is the fastest path to a 90+ score.
Last Updated: April 2026
BSEB Class 10 Science — Exam Pattern and Chapter Weightage
• Exam Board: Bihar School Examination Board (BSEB), Patna
• Total Marks: 100 (Theory 80 + Internal Assessment 20)
• Theory Paper: Objective (40 marks) + Subjective (40 marks)
• Duration: 3 hours 15 minutes
• Medium: Hindi, English, Urdu (choice-based)
• Passing marks: 33% in Theory + Internal combined
Chapter-Wise Weightage Table
| Chapter | Topic | Approx. Marks | Priority |
|---|---|---|---|
| Chapter 1 | Chemical Reactions and Equations | 5-6 marks | High |
| Chapter 2 | Acids, Bases and Salts | 5-6 marks | High |
| Chapter 3 | Metals and Non-metals | 4-5 marks | High |
| Chapter 4 | Carbon and its Compounds | 4-5 marks | High |
| Chapter 6 | Life Processes | 5-7 marks | Very High |
| Chapter 8 | How do Organisms Reproduce | 4-5 marks | Medium |
| Chapter 12 | Electricity | 6-8 marks | Very High |
| Chapter 10 | Light — Reflection and Refraction | 5-7 marks | Very High |
| Chapter 13 | Magnetic Effects of Current | 4-5 marks | High |
Bihar Board Specific Preparation Tips
• Hindi medium students: Write answers in Hindi — BSEB examiners prefer complete answers in one medium. Mixing languages can cost marks.
• Diagram importance: Bihar Board awards 1-2 extra marks for neat, labelled diagrams in Long Answer questions. Always draw diagrams for — electric circuit, eye structure, digestive system, concave/convex mirror.
• MCQ strategy: Eliminate clearly wrong options first. BSEB MCQs often have two “almost correct” options — read carefully.
• Definitions: Learn exact NCERT definitions. Bihar Board uses NCERT-based curriculum and checks for keyword-accurate definitions.
NEREST = Nutrition, Excretion, Respiration, Excretion (transport), Sensory-response (control), Transport
For exam: Life Processes = NECCTR: Nutrition, Excretion, Control, Circulation, Transport, Reproduction
20 Practice MCQs — Bihar Board Class 10 Science
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Previous Year Pattern Analysis — BSEB Class 10 Science
Based on BSEB Class 10 Science papers from 2022-2025:
- Most asked topics in Objective: Ohm’s law, pH scale, photosynthesis, types of chemical reactions, reflection/refraction laws
- Most asked in Long Answer: Electricity (circuit diagrams), Life Processes (digestive system/diagram), Light (lens/mirror ray diagrams)
- 3-mark questions frequently asked: Define photosynthesis and write the equation; State Ohm’s law and write formula; Difference between concave and convex lens
- Diagrams most expected: Electric circuit with bulb and battery, Human digestive system (labelled), Ray diagram for concave mirror, Human eye
Short Answer and Long Answer Tips for BSEB
• Short Answer (2 marks): Write in 2-3 sentences. Include the key scientific term. End with a conclusion statement.
• Long Answer (5 marks): Introduction (1 sentence) + Main points (3-4 points) + Diagram (if applicable) + Conclusion. Follow this structure strictly.
• Always write balanced chemical equations and show balancing steps for Chemistry questions.
• In Physics, show all calculation steps (Formula → Substitution → Answer with units). Partial marks are awarded for each step.
Frequently Asked Questions — BSEB Class 10 Science
Q: What is the passing marks for Bihar Board Class 10 Science?
A: Candidates need to score at least 33% in the theory examination (minimum 26.4 out of 80) and 33% overall including internal assessment. Failing the theory paper means failing the subject.
Q: Is NCERT sufficient for Bihar Board Class 10 Science?
A: Yes, NCERT is the primary textbook for BSEB Class 10 Science. BSEB uses the NCERT curriculum. However, studying BSEB-specific sample papers and previous year papers is essential for understanding the exact question format.
Q: What language is best for answering in Bihar Board Science exam?
A: Answer in whichever language you chose at the time of form filling (Hindi or English). Do not mix languages in answers. Hindi medium students should answer entirely in Hindi for consistency.
Q: How important are practical/internal assessment marks in BSEB?
A: Internal assessment is 20 marks and is crucial. Students who miss practical sessions or submit incomplete internal work risk losing those marks. These 20 marks can make the difference between passing and failing.
Sources: BSEB official model papers, NCERT Class 10 Science textbook, Bihar Board previous year question papers 2022-2025. Content accurate as of April 2026.
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