NIOS Class 10 Science and Technology 212 Solved TMA (October 2026)

NIOS Class 10 Science and Technology 212 Solved TMA answers are what most learners come hunting for once the submission date starts inching closer, and this page is built to take the guesswork out of it. Every question NIOS has set for the current cycle is laid out below in full, and two of them come with complete answers so you can see exactly what our writing looks like before you decide anything. Nothing here is padded to look bigger than it is.

Written by Prateek Talwar | Reviewed by Jyoti Sharma, Senior NIOS Counsellor | Last updated: July 2026 | Session: October 2026

NIOS Class 10 Science and Technology 212 Solved TMA Overview

Subject code 212 is a bit of a mixed bag, and that is rather the point. Physics, chemistry, biology and environmental science all live inside one book, and the assignment happily pulls from every corner of it. The October 2026 set runs to six main questions, and each one hands you an internal choice, so you only ever attempt one part from each pair.

The word limits matter more than students expect. Questions one to three are short answers of forty to sixty words. Four and five stretch to around a hundred and fifty. The sixth is a full project with diagrams. Our solved version answers both options in every pair, so if you lean towards biology in one question and physics in another, you are still covered.

This page sits inside our wider NIOS Class 10 Solved TMA collection, so if you are juggling more than one subject this session, you can pick up the matching sets without hopping between random sites to find them.

Why the Science and Technology 212 TMA Counts Towards Your Result

Plenty of learners treat the assignment as a box to tick and throw everything at the written paper instead. It is an expensive habit. The tutor marked assignment carries twenty per cent weightage of your final theory marks in each subject, and the public exam takes the other eighty. On a hundred mark subject, twenty marks are settled before you ever walk into the hall.

Better still, those are the friendly twenty. You write them at home with the book open, nobody timing you, and your study centre tutor marks them. A tidy assignment can nudge a shaky result into a comfortable pass, and it quietly takes the weight off exam day once you know part of your score is already banked.

If you want the full picture of how open schooling assessment fits together, our explainer on NIOS TMA walks through the marking split, the deadlines, and why you cannot skip submission if you plan to sit the public exam.

Every Question in the Science and Technology 212 TMA for October 2026

Here is the whole question paper, worded the way NIOS has framed it for this cycle. Read it through first, get a feel for what each pair is asking, then decide which option suits you. Two of these are answered in full a little further down the page.

Question 1 (attempt any one, 40–60 words)

(A) From the given velocity-time graph, obtain the acceleration-time graph.

(B) The position-time data of a moving object is given in the table. (i) Determine the average velocity during the first 20 seconds. (ii) Calculate the average velocity from t = 30 s to t = 40 s, and state what this indicates about the object's motion.

Question 2 (attempt any one, 40–60 words)

(A) Millets were once staple foods in India but declined after the Green Revolution, which prioritised high-yield wheat and rice. Growing wheat in one season and millets in another on the same land improves soil health. What is such a method of crop production called? Provide additional examples of this method along with its benefits.

(B) Rashid's uncle was found to have Hypertension and Diabetes, which are non-communicable diseases linked to lifestyle. Suggest some preventive measures for conditions like Hypertension, Diabetes and Obesity.

Question 3 (attempt any one, 40–60 words)

(A) The water supply in a town is contaminated with both soluble and insoluble impurities. Describe the various methods that can be used to purify the water and make it safe for drinking. (See Lesson 26)

(B) Air pollution is a growing concern due to vehicle emissions, industries and deforestation. How can you and the public help improve your city's air quality? Suggest practical and innovative solutions. (See Lesson 26)

Question 4 (attempt any one, 100–150 words)

(A) Haldane and Oparin proposed that life originated in shallow seas with a high concentration of organic compounds. What conditions did they suggest were necessary for the formation of these compounds? Name the scientists who provided experimental support to this hypothesis and describe the experiment conducted. (See Lesson 20)

(B) Identify the tissues present in the growing regions of plants, such as root and shoot tips, and describe their main characteristics. What are these tissues called once they lose their ability to divide? Also write a short note on vascular tissues and their functions in plants. (See Lesson 21)

Question 5 (attempt any one, 100–150 words)

(A) Ice cubes at −20°C are heated over a flame and temperatures are recorded at intervals. (i) Why does the temperature stay constant between 10 and 20 minutes, and again from 80 to 110 minutes, despite continuous heating, and where does the heat energy go? (ii) What is the amount of heat required per kilogram of ice and per kilogram of water during these processes?

(B) Sound waves and radio waves are used in communication devices. Name and describe the echo-based techniques that use these waves, and illustrate your explanation with relevant diagrams.

Question 6 (prepare any one project)

(A) Identify which among common salt, iron filings and sand is an element, compound or mixture, and justify your answer. Then explain, with suitable diagrams, the detailed processes to separate each component from a mixture of the three.

(B) Reena's new iron gate developed a brown flaky substance after the monsoon, and Sohan's boiled milk turned sour overnight. Explain the process behind the rusting of iron and the spoilage of milk, their ill effects seen around us, and at least three methods to prevent each.

Sample Answers from the Science and Technology 212 Solved Assignment

Talk about quality is cheap, so we would rather just show you. Below are two answers lifted straight from the solved set, one short and one long, so you can see how each format is handled. The full pack treats every remaining question with the same care.

Sample 1 — Question 2 (A): Crop rotation

This method is called crop rotation. In crop rotation, one crop is replaced by another on the same land to maintain fertility. Examples are rice followed by gram, wheat followed by pulses, or potato followed by moong. Its benefits include maintaining soil fertility, increasing production, controlling pests, preventing soil erosion, and ensuring regular income for farmers.

Sample 2 — Question 4 (A): Origin of life and the Miller-Urey experiment

J.B.S. Haldane and A.I. Oparin proposed that the early earth had a reducing atmosphere without oxygen, rich in gases like methane, ammonia, hydrogen, carbon monoxide and water vapour. Volcanic eruptions, ultraviolet radiation and lightning supplied energy for chemical reactions. These conditions favoured the formation of simple organic molecules, which accumulated in the oceans to form a primordial soup.

Later, Stanley Miller and Harold Urey gave experimental proof in 1953. They built an apparatus containing methane, ammonia, hydrogen and water vapour to simulate the early atmosphere. Electric sparks mimicked lightning, and after about a week the liquid was found to contain amino acids, the building blocks of proteins. This showed that under primitive earth conditions, complex organic compounds essential for life could form naturally, supporting the Haldane-Oparin hypothesis of life's origin.

See how the short answer makes its point and stops well inside sixty words, while the long one moves cleanly from hypothesis to proof without rambling? That mix of accuracy and word discipline is what quietly earns the full internal marks.

Chapters Behind the Science and Technology 212 TMA Questions

The assignment does not touch every lesson, but knowing where each question comes from makes revision far less of a shot in the dark. Subject code 212 spreads across seven modules and thirty-two lessons. The table below lists all of them with the key ideas in each, and marks the lessons this October 2026 paper actually draws from.

Lesson	Chapter	Key topics you should revise	In this TMA
1	Measurement in Science and Technology	SI units, significant figures, precision and accuracy, measuring length, mass and time	–
2	Matter in Our Surroundings	States of matter, interconversion, elements, compounds and mixtures, separation methods	Q6 (A)
3	Atoms and Molecules	Laws of chemical combination, mole concept, atomic and molecular mass, formulae	–
4	Chemical Reaction and Equations	Balancing equations, oxidation and reduction, corrosion, rancidity, types of reactions	Q6 (B)
5	Atomic Structure	Sub-atomic particles, Bohr model, electronic configuration, isotopes and isobars	–
6	Periodic Classification of Elements	Mendeleev to modern periodic table, groups, periods, periodic trends	–
7	Chemical Bonding	Ionic and covalent bonds, electron dot structures, valency, bond properties	–
8	Acids, Bases and Salts	pH scale, indicators, neutralisation, common salts and their uses	–
9	Motion and its Description	Distance, displacement, speed, velocity, acceleration, velocity-time graphs	Q1 (A, B)
10	Force and Motion	Newton's laws, inertia, momentum, force and its effects on motion	Q1 (A, B)
11	Gravitation	Universal law of gravitation, falling bodies under gravity, weight versus mass, buoyancy	–
12	Sources of Energy	Conventional and non-conventional sources, renewable energy, fuels	–
13	Work and Energy	Work done, kinetic and potential energy, power, law of conservation of energy	–
14	Thermal Energy	Heat and temperature, latent heat of fusion and vaporisation, phase change	Q5 (A)
15	Light Energy	Reflection, refraction, lenses, mirrors, image formation and dispersion	–
16	Electrical Energy	Ohm's law, resistance, electric power, heating effect of current	–
17	Magnetic Effect of Electric Current	Magnetic field, electromagnets, motors, electromagnetic induction	–
18	Sound and Communication	Sound waves, echo, SONAR and RADAR, reflection of sound, communication	Q5 (B)
19	Classification of Living Organisms	Five kingdom system, basis of classification, taxonomic hierarchy	–
20	History of Life on Earth	Origin of life, Oparin-Haldane hypothesis, Miller-Urey experiment, evolution	Q4 (A)
21	Building Blocks of Life: Cell and Tissue	Cell structure, meristematic and permanent tissues, xylem and phloem	Q4 (B)
22	Life Process I	Nutrition, transportation, respiration and excretion in plants and animals	–
23	Life Processes II	Control and coordination, nervous system, hormones, reflex action	–
24	Life Processes III	Asexual and sexual reproduction, reproductive systems, fertilisation	–
25	Heredity	Mendel's laws, dominant and recessive traits, sex determination, variation	–
26	Air and Water	Air pollution and control, water purification, hardness, potable water	Q3 (A, B)
27	Metals and Non-metals	Physical and chemical properties, reactivity series, extraction, alloys	–
28	Carbon and its Compounds	Covalent bonding in carbon, hydrocarbons, functional groups, soaps	–
29	Natural Environment	Ecosystem, food chains and webs, energy flow, biogeochemical cycles	–
30	Human Impact on Environment	Pollution, global warming, ozone depletion, waste management	–
31	Food Production	Crop improvement, crop rotation, irrigation, animal husbandry, fertilisers	Q2 (A)
32	Health and Hygiene	Communicable and non-communicable diseases, lifestyle disorders, immunity	Q2 (B)

Once the exact lessons are in front of you, revision gets a lot more focused. If you also want the official lesson bifurcation and the marking pattern, our NIOS Class 10 Syllabus page sorts out which lessons belong to the assignment block and which are held back for the public exam.

How Our Science and Technology 212 Solved Assignment Is Written

Every answer starts with the actual NIOS book for subject code 212, not a second-hand shortcut. We read the lesson the question points to, work out what the examiner is really after, and write it in plain language a Class 10 learner can reproduce in the exam. Numericals are worked step by step, and the project diagrams are drawn so they are simple to copy by hand.

We also stick to the format rules that genuinely matter to NIOS. Short answers stay inside their word band, projects carry proper headings and labelled figures, and nothing is lifted word for word from another site. Identical text across submissions is exactly the thing tutors notice, so the goal is always an answer that reads as your own honest work.

This same lesson-first habit runs through all our NIOS Study Material, from notes and important questions to practical files, so whichever resource you reach for, the tone and the reliability stay the same.

Get the Complete NIOS Class 10 Science and Technology 212 Solved TMA

The two samples above are yours to read and pick apart. The complete solved set, all six questions with both options plus a ready handwritten file, goes out directly on WhatsApp so it reaches you quickly and you can ask anything that is unclear. Just message the NIOS desk, tell us it is for subject code 212, and we will sort you out.

WhatsApp 9654 279 279 or WhatsApp 9899 436 384

Want to see the lay of the land first? Browse our full NIOS Solved TMA library to check which subjects and sessions we already cover before you message.

What Comes with the Science and Technology 212 Solved TMA Pack

Taking the solved set gets you more than a bare answer key. It is put together so you can go from download to a submission-ready file with as little fuss as possible.

• All six questions solved, both options in every pair, so nothing gets left for you to scramble over at the last minute.
• Word counts that behave, with short answers held to forty to sixty words and long ones to about a hundred and fifty, just as the tutor expects.
• Labelled diagrams for the graph, SONAR, RADAR and mixture-separation questions, drawn to be copied out neatly.
• A handwritten file option, since NIOS will not accept computer-typed assignments and wants them in your own hand.
• A PDF and softcopy too, handy for glancing at on your phone while you write the final copy.

It is all prepared for the October 2026 cycle, so the questions line up with the set sitting on the student portal right now for subject code 212.

Writing and Submitting Your Science and Technology 212 TMA Correctly

A solved set hands you the content, but a few submission habits are what actually protect the marks. NIOS evaluates the assignment at your accredited institution, and neat, rule-abiding work always reads better to a tutor working through a tall pile of files.

• Write it by hand on ruled sheets. Typed or printed answers are not accepted for the tutor marked assignment.
• Copy out the question, then write the answer under it, and respect the word limit given for that question.
• Sketch diagrams in pencil with a clear caption, and label the parts rather than leaving a bare drawing.
• Put your name, enrolment number and subject code on the cover so the file is credited to you.
• Hand it in to your study centre with time to spare, because late assignments are usually turned away.

Do those, and the twenty internal marks are genuinely yours for the taking. The solved set clears the hardest hurdle, which is knowing what to write, and leaves you the far gentler job of presenting it well.

FAQs on the Science and Technology 212 Solved TMA

Is the NIOS Class 10 Science and Technology 212 Solved TMA updated for October 2026?

Yes. It matches the assignment questions live on the NIOS student portal for subject code 212 in the October 2026 cycle. All six questions and both of their options are answered against this session's paper, so you are never stuck with an outdated set. And if NIOS quietly changes a question mid-session, the pack is refreshed to match before it reaches your hands.

How many marks does the Science and Technology 212 TMA carry?

The tutor marked assignment is worth twenty per cent of your final theory marks in subject code 212, with the public exam carrying the other eighty. On a hundred mark subject that is twenty marks settled at home before you reach the exam hall. Since you write them with the book open and no clock running, they are some of the easiest marks going.

Can I copy the Science and Technology 212 Solved TMA answers word for word?

You can lean on them as your model, but it is smarter to write in your own hand and reword where you can. NIOS wants handwritten work, and tutors do spot it when a batch of learners hands in identical text. Our answers are built to be understood and reproduced, not just copied, so read each one, get the point, and set it down in your own words.

Does the Science and Technology 212 Solved TMA include diagrams?

Yes, the diagram questions are covered in full. The velocity graph in question one, the SONAR and RADAR sketches in question five, and the mixture-separation setups in question six all arrive as clean, labelled figures. They are drawn so you can copy them onto your sheet without second-guessing anything. Clear diagrams often carry marks of their own, so each one is kept accurate and properly captioned.

How do I get the full Science and Technology 212 Solved TMA?

Message our NIOS desk on WhatsApp at 9654 279 279 and mention subject code 212 for the October 2026 session. We will send over the complete solved set, all six questions with both options, plus a handwritten file and a PDF to refer to. You can drop any doubt straight into the same chat, so you are looked after from download right through to submission.

Disclaimer: Unnati Educations is an independent academic support platform and is not affiliated with, endorsed by, or officially connected to the National Institute of Open Schooling (NIOS). The subject code, lesson names and assignment questions referenced here belong to NIOS and are used only to help learners study. Always cross-check the current assignment on the official NIOS student portal before you submit.