BSE Odisha Class 10 Supplementary 2026 Science: Chapter-Wise Weightage and Must-Do Topics

BSE Odisha Class 10 Supplementary 2026 Science exam is scheduled for June 26, 2026 — and knowing which chapters carry the most marks is the fastest way to use your remaining preparation time well.

The Board of Secondary Education, Odisha conducts the Class X Supplementary Exam for students who could not clear the main annual examination. The Science theory paper is 80 marks and covers Physics, Chemistry, and Biology together. Practical marks (20) are typically carried over from the main exam. Targeting high-weightage chapters first gives you the best return on every hour you study.

• Exam date: June 26, 2026 — BSE Odisha Class 10 Supplementary Science
• Theory paper: 80 marks (3 hours); Practical: 20 marks; Total: 100 marks
• Three sections: Physics (approx 25–27 marks), Chemistry (approx 26–28 marks), Biology (approx 27–28 marks)
• Highest-weightage chapters: Life Processes, Electricity, Chemical Reactions and Equations, Carbon and its Compounds
• Official portal: bseodisha.ac.in

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BSE Odisha Class 10 Science Supplementary 2026 Exam Pattern

The Science theory paper for the BSE Odisha Class X Supplementary 2026 follows the same format as the main annual exam. You get 3 hours to attempt 80 marks worth of questions. The paper includes Very Short Answer (VSA), Short Answer (SA), and Long Answer (LA) question types drawn from all three science subjects.

Physics, Chemistry, and Biology questions appear in a single combined paper. The BSE Odisha Class X Science syllabus is aligned with NCERT content, so NCERT textbook questions and activities form the core of your preparation.

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Physics: Chapter-Wise Marks Weightage

The Physics section contributes approximately 25–27 marks to the Science theory paper. Electricity and Light are the two chapters with the highest expected marks and appear in both short-answer and numerical question types every year.

Start your Physics revision with Electricity — Ohm’s Law, series and parallel circuit calculations, electric power (P = VI), and the heating effect of current are tested almost every year. In Light, practise the mirror formula, lens formula, and magnification numericals. Ray diagrams for concave and convex mirrors and lenses must be drawn with correct labels.

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Chemistry: Chapter-Wise Marks Weightage

Chemistry contributes approximately 26–28 marks to the theory paper. Chemical Reactions and Equations and Carbon and its Compounds are the two highest-weightage chapters and together account for nearly 14 marks based on previous year trends.

Balancing chemical equations is non-negotiable — it is tested directly and embedded in other question types. For Carbon and its Compounds, know the major functional groups, the homologous series, and the properties of ethanol and ethanoic acid. Acids, Bases and Salts questions regularly focus on the pH scale, universal indicators, and salt formation reactions.

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Biology: Chapter-Wise Marks Weightage

Biology is the highest-scoring section in the paper, contributing approximately 27–28 marks. Life Processes alone is the single most important chapter across the entire Science paper and is tested through both theory and diagram questions.

Life Processes should be your Biology starting point — photosynthesis (equation and conditions), the human digestive system, aerobic and anaerobic respiration, double circulation in the human heart, and the human excretory system are all tested regularly. In Control and Coordination, cover reflex arcs, the human brain diagram, and plant hormones (auxin, gibberellin). For Reproduction, know both asexual and sexual types with diagrams of the human reproductive system.

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Must-Do Topics for BSE Odisha Class 10 Science Supplementary 2026

With the exam on June 26, 2026, focus your final revision on these high-yield topics across all three subjects:

Diagrams carry dedicated marks in the paper. Practise labelling these five diagrams without looking: the human heart, the human brain, the reflex arc, the human excretory system, and ray diagrams for concave/convex lenses and mirrors. Even a partially correct diagram earns partial marks.

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Quick Preparation Tips for BSE Odisha Science Supplementary 2026

Your study time before June 26, 2026 is limited. These strategies give you the best marks per hour of study:

• Begin with Biology — it has the highest marks and much of the content is memory-based, so you can cover it faster than Physics numericals or Chemistry reactions.
• Solve 5 Physics numericals every day from Electricity and Light — formula-based questions become automatic with repetition and carry guaranteed marks.
• Write chemistry reactions by hand — do not just read them; write and balance equations until you can do them without looking at the textbook.
• Use BSE Odisha previous year question papers available on the official portal to understand the exact question distribution and marks pattern.
• Reserve the last two days for revision only — no new topics; use that time to drill diagrams, formulae, and definitions from the six highest-weightage chapters.
• Download the official Class X Science model question papers from bseodisha.ac.in and solve at least two full papers under timed conditions before the exam.