SSLC Science important questions 2027, ranked by blueprint weightage
Science is 80 marks across Physics, Chemistry and Biology, and KSEAB's own blueprint tells you exactly how those marks are split by chapter. Here are high-yield practice questions for the heaviest chapters first, plus where to find the real official papers.
Note:These are high-yield practice questions based on KSEAB's heavy blueprint weightage, not guaranteed predictions. Treat them as practice to build your foundational skills before taking on full mock exams.
Where to find the real official sources
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Ranked by blueprint weightage
Marks shown are from KSEAB's published Science blueprint. They're a strong guide to where your revision time pays off most — confirm the exact figures against the official 2026-27 blueprint.
Electricity
PHYSICSThe single heaviest chapter in Science. It's almost always good for a long-answer derivation plus a numerical, so skipping it costs more than skipping anything else on this list.
- State Ohm's law and derive the equivalent resistance of resistors connected in series and in parallel.
- Define electric power and derive the relation between power, potential difference and current.
- Solve a numerical to find current, resistance or potential difference using Ohm's law.
Light — Reflection and Refraction
PHYSICSEqually weighted with Electricity, and the chapter where diagram marks are easiest to lose for no reason other than a mislabelled ray.
- Draw ray diagrams for image formation by a concave mirror and a convex lens for different object positions.
- Solve numericals using the mirror formula, lens formula and magnification.
- Distinguish between a real image and a virtual image, with one example of each.
Acids, Bases and Salts
CHEMISTRYA reliably repeated chapter — questions on common salts and their everyday uses show up almost every year in some form.
- Write the preparation and uses of baking soda, washing soda and bleaching powder.
- Explain the pH scale and its importance in daily life, with two examples.
- Describe the reaction of acids and bases with metals, and write the balanced equations.
Metals and Non-Metals
CHEMISTRYTests both factual recall (the reactivity series) and applied reasoning (why one metal displaces another) — a common combination in this chapter's long-answer questions.
- Write the activity series of metals and explain a displacement reaction with an example.
- Describe the extraction of metals from their ores, from low, medium and high reactivity.
- Explain the process of corrosion and two ways to prevent it, with examples.
Life Processes
BIOLOGYA Biology staple where a correctly labelled diagram often carries as many marks as the written explanation next to it.
- Draw and label the human heart and explain the concept of double circulation.
- Explain the process of nutrition in human beings, from ingestion to egestion.
- Describe excretion in humans with a labelled diagram of the nephron.
Magnetic Effects of Electric Current
PHYSICSPairs naturally with Electricity in how it's taught, and brings its own diagram-heavy questions on field lines and the electric motor.
- State Fleming's left-hand rule and explain the working of an electric motor with a labelled diagram.
- Draw the magnetic field lines due to a current-carrying straight conductor and a circular loop.
- Explain electromagnetic induction and the working principle of an electric generator.
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Carbon and its Compounds
CHEMISTRYOrganic chemistry at the SSLC level is mostly naming and a handful of named reactions — high-return once the pattern clicks.
- Name organic compounds and write the reactions of esterification and saponification.
- Explain the difference between saturated and unsaturated hydrocarbons, with examples.
- Write the structural formula and properties of ethanol and ethanoic acid.
Heredity and Evolution
BIOLOGYA short chapter that rewards precision — Mendel's cross and the Punnett square are a near-guaranteed question type here.
- Explain Mendel's monohybrid cross with a Punnett square and the resulting ratio.
- Describe the mechanism of sex determination in human beings.
- Explain how variation during reproduction contributes to evolution, with one example.
Also worth covering
| Chapter | Approx. marks | What tends to be asked |
|---|---|---|
| Control & Coordination | ~5 | Reflex arc diagram, nervous system vs. hormonal control, plant tropisms |
| How do Organisms Reproduce | ~5 | Human reproductive system diagrams, asexual reproduction methods |
| Our Environment | ~3–4 | Food chains, ozone depletion, waste management — short-answer heavy |
| Periodic Classification | ~3–4 | Mendeleev vs. modern periodic table, trends across a period/group |
Marks are approximate and based on recent published blueprints.
Science FAQs
How many marks is SSLC Science out of?
Science is 80 marks for the written exam plus 20 marks internal assessment, 100 in total. The written paper has 38 questions covering Physics, Chemistry and Biology together.
Will these exact questions come in the 2027 Science paper?
No one can promise that. These are high-yield practice questions built from chapters with the heaviest blueprint weightage and question types KSEAB repeats. Use them to build skill, then test yourself on the official model papers.
How important are diagrams in SSLC Science?
Very important, especially in Physics and Biology. Ray diagrams for Light, circuit diagrams for Electricity, and labelled diagrams like the human heart or a neuron each carry marks on their own, separate from the written explanation.
Where can I get the official SSLC Science 2026-27 model papers?
KSEAB publishes the SSLC model question papers with model answers for Science (Subject Code 83) on kseab.karnataka.gov.in, usually in four sets. Look for the Model Question Papers section.
Is it enough to study only important questions for SSLC Science?
No. Every chapter carries marks in the blueprint, and internal choice covers only a few extra questions. Important questions help you prioritise your time and practise the right question types, but they work best layered on top of complete syllabus coverage.
How to practise these properly
- Attempt before you check. Write the answer from memory first, then compare with the textbook or model answer.
- Draw it, don't just describe it. For Physics and Biology diagrams, practise the drawing itself under time pressure, not just the labels.
- Time yourself. Practise 1, 2, 3 and 4-mark questions against the clock so answer length becomes a habit.
- Keep an error log. Note every mistake by chapter and revisit the log weekly — most SSLC Science mistakes repeat until logged.
- Finish with full model papers. Use KSEAB's model paper sets as full-length, timed dress rehearsals.
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