CBSE 10 Science · Lab
Internal Assessment and Practical Work
Syllabus-listed 20-mark internal-assessment component: periodic assessment, multiple assessment, portfolio and subject enrichment. Practical work includes pH testing, acid/base properties, reaction classification, metal reactivity, Ohm's law and V-I graph, equivalent resistance, stomata mount, respiration CO2 test, acetic acid properties, soap in hard/soft water, focal length experiments, glass slab refraction, binary fission/budding slides, prism ray tracing, and dicot seed embryo identification.
Test yourself
A focused, distraction-free run through 25 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic Lab.1
pH, Indicators and Reaction Observations
pH testing, acid-base behaviour, gases, precipitates, displacement and decomposition observations.
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Topic Lab.2
Metals, Acetic Acid and Soap Tests
Metal reactivity, properties of acetic acid, and comparative lather formation in hard and soft water.
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Topic Lab.3
Ohm's Law and Resistor Combinations
V-I graph, correct meter connections, resistance from graph, and equivalent resistance in series and parallel.
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Topic Lab.4
Biology Slides, Respiration and Dicot Embryo
Stomata temporary mount, carbon dioxide during respiration, binary fission, budding and dicot seed embryo parts.
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Topic Lab.5
Focal Length, Glass Slab and Prism Tracing
Focal length of mirror/lens, rectangular glass slab refraction, prism tracing, ray diagrams and precautions.
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