Case-based questions catch even well-prepared students off guard. You can know every definition in the chapter and still lose marks here, not because the concept is hard but because the format is unfamiliar. Here is what they are, how to solve them and how to practise until they feel routine.
A case-based question gives you a passage, scenario, data table or diagram and asks several linked questions about it. In the CBSE Class 10 Science paper they have their own section, typically three cases of 4 marks each. To solve one: read the whole case first, identify the chapter concept, underline the key details, answer each part using both the passage and your syllabus knowledge, and check that later parts fit your earlier answers.
What are case-based questions?
A case-based (or source-based) question gives you a short passage, real-world scenario, experiment description, graph, diagram or data table, followed by a few questions based on it. In the Science paper, case-based questions form their own section and carry more marks than a single MCQ, so a whole case is worth a serious block of marks. CBSE introduced them as part of a shift towards competency-based assessment: instead of asking whether you memorised a fact, they test whether you can apply a concept to a situation you have not seen before. Check the current paper structure for how many appear and how they are marked.
That is why they feel harder than they are. The concept is usually straight from your textbook. The difficulty is reading and application, skills most students never practise specifically for Science.
How do you solve case-based questions in Class 10 Science?
1. Read the whole case before the questions
It is tempting to jump to question (i) and scan the passage for the answer. Resist. Read the full case, and ask as you go: which chapter and concept is this pointing to? Once you spot it, every sub-question becomes easier to place.
2. Name the concept
Most cases are written around one or two ideas. If the passage describes a person unable to see distant objects clearly, you are in Human Eye and defects of vision. A passage on a food chain with a toxic chemical points to Our Environment. Naming the chapter brings back the right vocabulary.
3. Underline the numbers and the nouns
In Science cases the passage is dense with specifics: quantities, conditions, named substances, stages of a process. If a case mentions a particular temperature, pH value or organism, a sub-question probably depends on exactly that.
4. Answer using the case plus your syllabus
Case-based questions test two things at once: whether you understood the passage and whether you can link it to what you have studied. Do not answer purely from memory without referring back, and do not answer purely from the passage without applying the principle. The strongest answers do both.
5. Watch for questions that build on each other
Sub-questions are often sequenced; part (ii) may depend on your reasoning in part (i). If an earlier answer feels off, re-check before moving on. See the traps in common case-based question mistakes.
How do you practise case-based questions?
You cannot get comfortable with cases by reading about the format. You get comfortable by seeing enough different passages that the pattern stops feeling foreign. The passages change every time, but the skill is constant: read carefully, identify the concept, apply it. That skill only builds with repetition.
- Practise them chapter by chapter so the concept-naming step becomes automatic.
- Attempt every part before checking, writing short answers, then compare with the model answer.
- Rate yourself honestly as correct, partly correct or missed, and revisit the last two categories after a gap.
- Do a few under timed conditions near the exam so reading speed does not surprise you.
Practise case-based questions, free: try case-based questions from real CBSE Class 10 Science papers → Not sure which chapters have them? See case-based questions chapter by chapter →
The broader routine is in how to practise Class 10 Science PYQs, and real past-paper cases are collected in CBSE Class 10 Science PYQs.
How does MindVsYou help with case-based practice?
Case-based questions from real past CBSE Class 10 Science papers are part of MindVsYou's subjective practice. You attempt each one, reveal the model answer, rate yourself honestly, and your ratings are tracked. Anything you rated as missed or partly right comes back through the revise-wrong-answers (subjective) mode. You can filter by chapter so you practise cases for the concepts you are weakest in. See how it works.
Frequently asked questions
What is a case-based question in CBSE?
A case-based question presents a passage, scenario, data set or diagram and asks a few linked questions about it. It tests whether you can apply a concept to a situation, not just recall a fact.
Are case-based questions difficult?
They feel harder than they are because the format is unfamiliar. The underlying concepts are usually from your textbook, and regular practice makes them routine.
Should I read the questions or the passage first?
Read the passage first, fully, so you can identify the concept. Then answer the questions with the passage in mind.
How should I write case-based answers?
Keep them short and specific. Refer to a detail from the passage, name the correct concept or term, and give a one- or two-line explanation, matched to the marks for that part.
What is a case-based passage?
A case-based passage is the short text, scenario, data table or diagram at the start of a case-based question. Read it first, then answer the linked sub-questions using both the passage and your syllabus knowledge.
How many marks are case-based questions worth in Class 10 Science?
In the commonly published CBSE Class 10 Science pattern, Section E has three case-based questions of 4 marks each, 12 marks in all. Confirm the exact split on the current-year sample paper.
Practise case-based questions from real CBSE papers, free
Attempt, reveal the model answer, rate yourself and revisit what you missed. Try it as a guest at quiz.mindvsyou.io — no app to install.