Bihar Board Class 10 Science objective and subjective questions together decide an 80-mark theory paper, and the two halves need two different kinds of preparation. The objective half rewards quick, accurate recall of NCERT facts on an OMR sheet. The subjective half rewards neat diagrams, correct units in numericals and short, well-ordered answers. This guide explains the BSEB Matric Science pattern, which chapters typically dominate, how to handle the Light and Electricity numericals, how to fill the OMR without losing marks, and a 10-week plan you can start today.
BSEB Matric Science exam pattern: 80 theory, 20 practical
The Bihar Board Class 10 Science paper typically carries 80 marks for theory and 20 marks for practical or internal assessment. The theory paper runs for 3 hours 15 minutes, of which the first 15 minutes are reading time. In recent years the theory paper has had two sections. Section A is objective: around 80 MCQs are printed and you answer 40 on the OMR sheet, one mark each. Section B is subjective: short-answer questions of 2 marks and long-answer questions of 5 marks, both with internal choice, adding up to the remaining 40 marks.
Confirm the exact counts from the latest Bihar Board Science model paper on biharboardonline.bihar.gov.in, because the number of printed questions and the internal choice have changed before. The structure, though, has been stable: half objective, half subjective, no negative marking. That means a student who is strong in NCERT facts has a safe base, and a student who can draw and label diagrams cleanly has an edge in the subjective half.
Bihar Board 10th Science important chapters: Physics, Chemistry, Biology
The BSEB Class 10 Science syllabus follows the NCERT Class 10 Science textbook, grouped into three parts. In recent papers the Physics group has typically carried the largest share, with Biology close behind and Chemistry slightly less. These are patterns, not fixed tables; confirm the current chapter list in the official syllabus, since a few chapters such as Periodic Classification of Elements and Sources of Energy may or may not appear depending on the edition of the BSEB textbook your school uses.
The chapters that typically dominate both halves of the paper are:
- Physics: Light - Reflection and Refraction (ray diagrams, mirror and lens formula, numericals), The Human Eye and the Colourful World (defects of vision, dispersion), Electricity (Ohm's law, series and parallel, heating effect, numericals) and Magnetic Effects of Electric Current (field lines, right-hand rules, motor and generator).
- Chemistry: Chemical Reactions and Equations (balancing, types of reactions), Acids, Bases and Salts (pH, common salt derivatives), Metals and Non-metals (reactivity series, extraction, corrosion) and Carbon and its Compounds (functional groups, homologous series, soap).
- Biology: Life Processes (nutrition, respiration, transport, excretion with diagrams), Control and Coordination (neuron, reflex arc, plant hormones), How do Organisms Reproduce? (flower, human reproductive system), Heredity (Mendel's crosses) and Our Environment (food chain, ozone).
- Light, Electricity and Life Processes together are typically the three heaviest chapters. Prepare them first and revise them most.
BSEB Matric Science objective questions and OMR strategy
Bihar Board Class 10 Science objective questions are mostly direct one-liners from the NCERT text: the SI unit of resistance, the focal length of a plane mirror, the pH of pure water, which gland secretes insulin, the chemical name of baking soda. Because around 80 are printed and only 40 are counted, you can afford to skip every question you are unsure of. Read all the questions in the 15 minutes of reading time, tick the sure ones in your head, and then fill the OMR for exactly 40.
Three OMR rules save marks every year. Darken one circle fully with a black or blue ballpoint pen, never a pencil tick. Do not attempt more than the number asked; extra answers do not earn extra marks and can confuse evaluation. Check the question number against the OMR row before darkening, because one shifted row ruins a whole column. Keep the last ten minutes of the paper only for checking the OMR count.
To prepare, make a list of 20 to 30 one-liners per chapter from the chapter summary, the in-text questions and the figures. Revise that list in short daily sessions rather than one long sitting. A short daily test on the Bihar Board syllabus, such as the Daily Board Dose in Myrix Learn, is one way to rehearse this kind of recall without sitting a full paper.
Subjective half: 2-mark short answers, 5-mark long answers and diagrams
The 2-mark questions in the BSEB Science paper typically ask for a definition plus one example, a difference in two points, a balanced equation, or a small labelled figure. Write in points, not paragraphs. For a difference question, draw a two-column table. For an equation, balance it and write the state symbols. Two clean points earn two marks; a long paragraph that hides the two points often earns one.
The 5-mark questions usually combine explanation, a diagram and sometimes a numerical: explain the working of an electric motor with a labelled diagram, describe the human excretory system with a figure, derive the relationship between resistances in series, or draw a ray diagram for an object placed between F and 2F of a convex lens. Diagrams are the most reliable source of marks here. Practise the standard set with a pencil until each one takes under three minutes: human eye, heart, nephron, neuron, reflex arc, stomata, flower, male and female reproductive systems, electric motor, AC generator, domestic circuit, and ray diagrams for concave mirror and convex lens.
Bihar Board 10th Science numericals: Light and Electricity
Numericals in the BSEB Class 10 Science paper come almost entirely from Light and Electricity, with occasional ones from Magnetic Effects. In Light, practise mirror formula and lens formula problems with the sign convention (distances measured from the pole, against the incident ray negative), magnification, power of a lens in dioptre, and refractive index with speed of light. In Electricity, practise Ohm's law, resistance from resistivity and length, equivalent resistance in series and parallel, Joule's heating law, and power and energy in kilowatt-hours for a household.
Write every numerical in the same four lines: given data with units, formula, substitution, answer with unit. Step marking in the subjective half means the formula and substitution earn marks even when the arithmetic slips. Keep a one-page formula sheet for each of the four Physics chapters and rewrite it from memory once a week.
Bihar Board Class 10 Science 10 week plan
This plan assumes about 90 minutes of Science per day and one longer sitting at the weekend. If your school has not finished a chapter, move it later, but keep the test weeks where they are.
- Week 1: Light - Reflection and Refraction. Ray diagrams, mirror and lens formula, 30 one-liners, numericals every day.
- Week 2: Electricity and Magnetic Effects of Electric Current. Circuit numericals, motor and generator diagrams, right-hand rules.
- Week 3: The Human Eye and the Colourful World plus Chemical Reactions and Equations. Defects of vision diagrams, balancing 20 equations.
- Week 4: Acids, Bases and Salts plus Metals and Non-metals. pH table, salt preparations, reactivity series, extraction flow charts.
- Week 5: Carbon and its Compounds plus Our Environment. Functional groups, homologous series, soap action, food chain and ozone.
- Week 6: Life Processes. Six diagrams (digestive system, heart, nephron, stomata, lungs, leaf section) and the one-liners.
- Week 7: Control and Coordination, How do Organisms Reproduce?, Heredity. Neuron and reflex arc, flower, Mendel crosses with ratios.
- Week 8: Two full model papers under exam timing, with an error log: chapter, question type, what went wrong.
- Week 9: Re-learn the weak chapters from the error log; one objective section practice of 40 questions daily.
- Week 10: Diagrams and formula sheets only, one mixed objective test a day, light revision of one-liners. Sleep well in the last three days.
Common mistakes in the BSEB Class 10 Science paper
Filling the OMR in a hurry at the end, drawing diagrams without labels, missing the unit in a numerical, writing the answer to the wrong option of an internal choice, and spending forty minutes on one 5-mark question. Fix the order: objective section first, then 2-mark questions, then 5-mark questions, and keep the last ten minutes for the OMR check.
Another avoidable mistake is studying from random guess papers instead of the NCERT text. BSEB questions come from NCERT, and the AI tutor in Myrix Learn is grounded in NCERT for the same reason, so a photo of a stuck numerical gets an explanation that matches the textbook method. Myrix Learn costs ₹99 for the first month and then ₹297/month, and students who complete 10 study days in a month get 25% of that month's fee back as a study reward (50% after 15 study days). Offline mode works when the network is weak.