NIOS Class 12 Practical Experiments – Ultimate Guide for September 2025 Exams

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September 23, 2025
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The National Institute of Open Schooling (NIOS) has announced that the Class 12 Practical Exams will be conducted from 12th September 2025 to 27th September 2025 across accredited exam centres. Exams will be held in batches, so students must confirm their subject-specific dates and timings with their study centres.

👉 Important Subjects in First Phase (September 12–15, 2025):

Home Science (321)
Biology (314)
Geography (316)
Painting (332)
Computer Science (330)
Mass Communication (335)

👉 Second Phase (September 16–19, 2025):

Chemistry (313)
Physics (312)
Environmental Science (333)

👉 Later Phases (September 20–27, 2025):

Vocational and skill-based subjects.

Students should also download their Hall Ticket from the NIOS Student Portal and verify the details with their exam centre.

🔎 What this post covers — NIOS Class 12 Practical Experiments

This detailed guide includes:

Subject-wise list of NIOS Class 12 Practical Experiments for Physics, Chemistry, Biology, Geography, Home Science, Computer Science, Environmental Science, Painting, and Mass Communication.
Sample experiment explanations with aims and observations.
Exam dates, preparation tips, and viva guidance.
Useful resources and contact details for extra support.

Alt text: NIOS Class 12 Practical Exams September 2025 Poster with subject list, experiments, and SchoolBase contact details.

⚡ Physics (312) – NIOS Class 12 Practical Experiments

Physics practicals check your application of laws, measurement accuracy, and diagram presentation.

To determine resistance per cm of a wire using meter bridge.
To verify Ohm’s Law using voltmeter and ammeter.
To find focal length of convex lens by plotting graph.
To study combination of resistors in series and parallel.
To verify laws of reflection using a plane mirror.
To determine refractive index of glass slab.
To study the characteristics of a diode or transistor.
To measure current and potential in a given circuit.
To observe diffraction and interference patterns.
To find resistance using Wheatstone bridge.
To study magnetic field of current carrying conductor.
To determine resistance of galvanometer.
To plot I-V curve of a p-n junction diode.
To calculate efficiency of a simple electrical device.

⚗️ Chemistry (313) – NIOS Class 12 Practical Experiments

Chemistry practicals emphasize titration, qualitative analysis, and organic reactions.

To prepare standard solution of oxalic acid.
To determine molarity of NaOH using titration.
To determine hardness of water sample.
To carry out redox titration using KMnO4.
To analyze salt mixture (cations and anions).
To study functional groups in organic compounds.
To identify given organic compound by chemical tests.
To prepare simple organic compounds (soap, ester).
To study kinetics of reaction with time.
To measure pH of various solutions.
To separate mixtures using chromatography.
To observe displacement reactions.
To test presence of carbohydrates, proteins, and fats.
To study effect of temperature on solubility.

🧬 Biology (314) – NIOS Class 12 Practical Experiments

Biology practicals involve microscopic observation, physiological processes, and specimen identification.

To prepare temporary mount of onion peel and human cheek cells.
To study mitosis in onion root tip.
To observe osmosis using potato experiment.
To test presence of starch in leaves.
To study respiration by lime water experiment.
To demonstrate transpiration using cobalt chloride paper.
To observe prepared slides of pollen germination.
To study Mendelian inheritance using charts.
To identify plant tissues from prepared slides.
To identify animal tissues from slides.
To study ecological adaptations in given specimens.
To examine permanent slides of embryonic stages.
To analyze water for presence of microorganisms.
To prepare herbarium of local plants.

🌍 Geography (316) – NIOS Class 12 Practical Experiments

Geography practicals test mapping and environmental data analysis.

To prepare and interpret climatic data.
To draw weather maps and interpret symbols.
To prepare thematic maps using data.
To analyze population distribution.
To calculate density of population.
To interpret topographical maps.
To prepare economic activity maps.
To identify soil samples.
To calculate rainfall averages.
To construct graphs for temperature and rainfall.
To prepare wind rose diagram.
To locate features on globe.
To study remote sensing images.
To conduct local field survey.

🏡 Home Science (321) – NIOS Class 12 Practical Experiments

To analyze nutrients in given food samples.
To prepare balanced diet charts.
To identify adulteration in milk, ghee, and sugar.
To prepare recipes with high protein value.
To demonstrate methods of food preservation.
To test quality of fabrics.
To practice stain removal techniques.
To study child growth and development.
To prepare family budget.
To demonstrate safety and hygiene in kitchen.
To compare detergents for cleaning ability.
To stitch simple garments.
To test water quality.
To study ergonomics in household activities.

💻 Computer Science (330) – NIOS Class 12 Practical Experiments

To write simple programs in C++/Python.
To create database and run SQL queries.
To design forms using HTML.
To perform file operations.
To demonstrate conditional statements.
To create flowcharts for algorithms.
To prepare programs using loops.
To generate reports from database.
To work on arrays and strings.
To test programs for debugging.
To use MS Excel for data handling.
To design PowerPoint presentations.
To manage files and directories.
To create simple projects integrating database and UI.

🌱 Environmental Science (333) – NIOS Class 12 Practical Experiments

To test pH of soil samples.
To analyze water quality for dissolved oxygen.
To study effects of pollution on plants.
To prepare report on local biodiversity.
To measure air quality indicators.
To conduct waste segregation experiment.
To observe greenhouse effect experiment.
To calculate carbon footprint.
To analyze renewable vs non-renewable energy sources.
To prepare models on energy conservation.
To study population growth data.
To conduct environmental awareness survey.
To measure noise levels in area.
To study impact of deforestation.

🎨 Painting (332) – NIOS Class 12 Practical Experiments

Still life drawing using pencil shading.
Nature study of plants and trees.
Portrait sketching with proportions.
Perspective drawing of buildings.
Watercolor painting of a landscape.
Poster making on social themes.
Calligraphy and lettering design.
Abstract painting with colors.
Composition on festivals.
Copying motifs from traditional art.
Preparation of greeting cards.
Experiment with line and texture.
Practice of different color schemes.
Preparation of mural design.

🎤 Mass Communication (335) – NIOS Class 12 Practical Experiments

To write a news report.
To prepare radio script.
To prepare TV script.
To conduct interview and transcribe it.
To create advertisement copy.
To prepare press release.
To write feature article.
To practice news reading.
To edit given news content.
To record audio for radio program.
To prepare layout of newspaper.
To prepare photo story.
To make short documentary script.
To review film or documentary.

🧪 Sample Experiment Explanations — NIOS Class 12 Practical Experiments

Physics: Ohm’s Law verification shows that current is directly proportional to voltage. Graph of V vs I is a straight line.
Chemistry: Acid-base titration helps determine concentration of unknown solution. Color change in indicator shows endpoint.
Biology: Starch test in leaves proves photosynthesis as leaves turn blue-black with iodine.
Geography: Weather map interpretation helps understand climate conditions.
Computer Science: Writing a simple Python program improves logic and coding skills.

🎯 Tips for Practicals — NIOS Class 12 Practical Experiments

Maintain record book neatly with Aim, Apparatus, Procedure, Observation, Result format.
Revise 2–3 key experiments in each subject thoroughly.
Practice diagrams for Physics, Biology, Geography, and Painting.
Be confident during viva; examiners ask basic conceptual questions.
Carry admit card, record file, ID, and required materials to exam hall.
Reach exam center early to avoid stress.

❓ FAQs — NIOS Class 12 Practical Experiments

Q1: What subjects have NIOS Class 12 practical exams?
A: Physics, Chemistry, Biology, Geography, Home Science, Computer Science, Environmental Science, Painting, and Mass Communication.

Q2: How many marks are allotted for NIOS Class 12 practicals?
A: Generally 30–40 marks, divided among experiments, record file, and viva.

Q3: How can I prepare for viva in NIOS Class 12 practical exams?
A: Revise aims, principles, and observations of experiments. Answer short and confidently.