NIOS Class 10 Science 212 Important Questions 2026 (Code 212) – Chapter-Wise Objective Question Bank

Science is one of those subjects where students feel ready going into the exam and then get caught off guard by how specific the objective questions actually are. If you are preparing for NIOS Class 10 Science and Technology (Code 212) in 2026, this page gives you the most important chapter-wise sample questions to practise. Answers are included. For complete solutions with explanations, call Unnati Education at 9654279279 or 9899436384.

NIOS Science 212 – Quick Overview

What Are NIOS Class 10 Science 212 Important Questions for 2026?

Here is what most students get wrong about preparing for this subject. They read through the chapters, understand the concepts, and feel genuinely confident. Then the exam comes and gives them four options — three of which look almost right — and suddenly that confidence wavers. Reading gives you understanding. Practising questions gives you recall under pressure. Those are two very different things. NIOS Science 212 covers seven modules and 32 lessons spanning everything from measurement and atomic structure to heredity and environmental science. There is a lot of specific factual content that only sticks when you practise it as questions. This page gives you the most important sample objective questions from the most frequently tested chapters. For the complete 2026 chapter-wise solution booklet, reach out to Unnati Education directly.

Module I – Measurement in Science and Technology

Chapter 1 is often skipped by students who assume nothing important gets asked from it. That is a mistake. SI units, prefixes, derived units, and scientific notation are tested very specifically — not just "what is the unit of force" but "which unit is derived" or "what does prefix pico represent." If you have not practised these in question format, four options that all look like units will leave you guessing.

Students who need their NIOS Class 10 TMA for Science 212 solved accurately and ready to submit can get it from Unnati Education in both typed and handwritten format.

Sample Questions

Q1. Which of the following is a derived unit? A. Kelvin B. Metre C. Pascal D. Mole Answer: C

Q2. Which unit prefix represents 10⁻¹²? A. Nano B. Pico C. Femto D. Micro Answer: B

Fill in the Blank The SI unit of pressure is __________. Answer: Pascal

True or False The SI unit of acceleration is m/s. Answer: False

Know your base units — metre, kilogram, second, ampere, kelvin, mole, candela. Everything else is derived. Pascal is pressure (force/area), Joule is energy (force × distance), Watt is power (energy/time). The exam tests which ones are derived and what they represent.

Module II – Matter in Our Surroundings

Chapter 5 – Atomic Structure

Atomic structure is one of the highest-value chapters in Module II for objective questions. J.J. Thomson, Rutherford, and Bohr — what each one discovered or contributed — is tested almost every year. Shell capacity, subatomic particle properties, and the limitations of atomic models are also standard.

Q1. Who discovered the electron using a cathode ray tube? A. Goldstein B. Bohr C. J.J. Thomson D. Rutherford Answer: C

Q2. What was the main drawback of Thomson's plum pudding model? A. It failed to explain valency B. It lacked evidence of positive charge C. It could not explain α-particle scattering D. It did not consider neutrons Answer: C

Fill in the Blank The atomic number (Z) of an element represents the number of __________ in its nucleus. Answer: Protons

True or False Electrons are located inside the nucleus of an atom. Answer: False

The sequence is worth memorising. Thomson discovered the electron. Rutherford discovered the nucleus. Bohr proposed fixed orbits for electrons. The exam gives you a description and asks you to name the scientist — get that direction clear and these questions become free marks.

Chapter 6 – Periodic Classification of Elements

Henry Moseley and the Modern Periodic Law, how atomic size changes across a period, which group halogens belong to — these are the questions that come back every year from this chapter.

Q1. Who gave the Modern Periodic Law? A. Newlands B. Mendeleev C. Henry Moseley D. Dobereiner Answer: C

Q2. In a period, atomic size: A. Increases B. Decreases C. Remains the same D. Becomes irregular Answer: B

Fill in the Blank Elements lying along the diagonal line in the periodic table are called __________. Answer: Metalloids

Chapter 8 – Acids, Bases and Salts

This chapter has some of the most enjoyable objective questions in the subject because so many of them come from everyday life. Which acid makes curd sour, which acid is in ant stings, what pH 13 tells you — students who have paid attention to the examples in this chapter will find these questions easy.

Students who want to practise all chapters together in one structured resource can get the complete NIOS Class 10 Important Questions booklet for Science 212 from Unnati Education.

Q1. Which acid is responsible for the sour taste in curd? A. Tartaric acid B. Acetic acid C. Lactic acid D. Formic acid Answer: C

Q2. The pH of a solution is 13. This solution is: A. Neutral B. Weakly acidic C. Strongly basic D. Weakly basic Answer: C

Q3. Which acid is present in the sting of ants? A. Citric acid B. Formic acid C. Acetic acid D. Lactic acid Answer: B

Fill in the Blank The gas released when zinc reacts with dilute sulphuric acid is __________. Answer: Hydrogen

Module III – Moving Things

Chapter 10 – Force and Motion

Newton's laws are tested in every format here — as definitions, as applications, and as numericals. F = ma is the most important formula. The exam gives you numbers and asks you to calculate acceleration or force. Practise that calculation until it is automatic.

Q1. A body continues in its state of uniform motion unless acted upon by: A. Balanced force B. Friction C. Gravity D. Unbalanced force Answer: D

Q2. A force of 20 N acting on a 4 kg object produces an acceleration of: A. 4 m/s² B. 5 m/s² C. 2 m/s² D. 8 m/s² Answer: B

Fill in the Blank Friction depends on smoothness of surfaces and __________ reaction. Answer: Normal

True or False In Newton's Third Law, action and reaction act on the same body. Answer: False

F = ma means 20 ÷ 4 = 5 m/s². That calculation format appears in the exam repeatedly. Know how to rearrange the formula — if you have force and mass, divide to get acceleration. If you have mass and acceleration, multiply to get force.

Chapter 11 – Gravitation

Gravitation brings in the universal law formula, the value of g, weight versus mass, and weightlessness. The numerical on weight calculation (W = mg) appears every year and should take you no more than ten seconds to answer.

Students who want to refer to previous NIOS exam papers can get the NIOS Class 10 question paper, collection for Science 212 from Unnati Education, covering multiple exam cycles with full solutions.

Q1. The force of gravitation between two objects is inversely proportional to: A. The square of the sum of their masses B. The square of the distance between them C. The sum of their masses D. The cube of the distance Answer: B

Q2. If a person has a mass of 60 kg, his weight on Earth (g = 9.8 m/s²) is: A. 600 N B. 588 N C. 60 N D. 9.8 N Answer: B

Fill in the Blank An astronaut in a freely falling spaceship experiences __________. Answer: Weightlessness

Weight = mass × g. So 60 × 9.8 = 588 N. That exact calculation format appears in the exam. Also remember — mass is constant everywhere, weight changes depending on gravity. This pair gets tested as a true or false and as a conceptual MCQ.

Module IV – Energy

Chapter 13 – Work and Energy and Chapter 15 – Light Energy

Work and Energy has reliable MCQs on kinetic energy relationships. When velocity doubles, KE = ½mv² means kinetic energy becomes four times because v² quadruples. That one relationship appears in the exam almost every year.

Light Energy questions test mirror types, lens properties, and dispersion. The rearview mirror question, the concave mirror and focal point question, and rainbow formation are standard.

Students who need chapter-wise NIOS Class 10 Intext and Terminal Questions for Science 212 can get the complete set from Unnati Education for thorough preparation.

Q1. If velocity is doubled, kinetic energy becomes: A. Doubled B. Tripled C. Four times D. Half Answer: C

Q2. Which mirror is used as a rearview mirror in vehicles? A. Plane mirror B. Concave mirror C. Convex mirror D. Cylindrical mirror Answer: C

Q3. Rainbow is formed due to: A. Reflection only B. Refraction only C. Dispersion only D. Refraction and dispersion Answer: D

Fill in the Blank 1 kilowatt-hour equals __________ joules. Answer: 3.6 × 10⁶

Chapter 16 – Electrical Energy

Energy consumption calculations in kWh, fuse placement, and Joule's law are all tested from this chapter. The exam gives you wattage and hours, and you calculate units consumed.

Q1. An electric heater rated 1000 W operates for 2 hours. Energy consumed is: A. 2000 kWh B. 2 kWh C. 0.5 kWh D. 1 kWh Answer: B

Q2. A fuse is always connected in: A. Neutral wire B. Earth wire C. Live wire D. Both live and neutral Answer: C

Fill in the Blank The heating effect of current is directly proportional to the __________ of current and time. Answer: Square

True or False A ceiling fan uses the heating effect of electric current to operate. Answer: False

Energy = Power × Time. So 1000 W × 2 hours = 2000 Wh = 2 kWh. This format appears in objective and short answer questions. Always convert watts to kilowatts before multiplying with hours to get the answer directly in kWh.

Module V – The Living World

Chapter 22 – Life Processes I and Chapter 25 – Heredity

Life Processes I has some of the most reliable questions in the entire subject. Blood groups, bile secretion, the nephron, and vitamin deficiencies are tested across MCQ, fill-in-the-blank, and true or false formats.

Heredity is where Mendel, DNA, and genetics come in. Father of genetics, chromosome count in gametes, and the gene combination for blood group O are all standard exam questions.

Q1. Which part of the nephron is primarily responsible for filtration? A. Loop of Henle B. Distal convoluted tubule C. Bowman's capsule D. Collecting duct Answer: C

Q2. Who is regarded as the father of genetics? A. Charles Darwin B. Sutton C. Hargobind Khorana D. Gregor Mendel Answer: D

Q3. How many chromosomes does a human gamete contain? A. 23 B. 46 C. 22 D. 44 Answer: A

Fill in the Blank The universal recipient blood group is __________. Answer: AB

True or False Thalassemia affects the production of haemoglobin. Answer: True

Universal donor is O. Universal recipient is AB. This pair gets mixed up constantly by students who know both facts but confuse which is which. Practise them as a pair and you will never get that question wrong again.

Module VI – Natural Resources

Chapter 27 – Metals and Non-Metals and Chapter 28 – Carbon and Its Compounds

Metals and non-metals has very direct factual questions. Sodium stored under kerosene, ZnO as an amphoteric oxide, ductility versus malleability, and preventing rusting — all are tested directly.

Carbon and its compounds brings in catenation, allotropes, functional groups, and compound names. Graphite conducts electricity. Diamond does not. Silica is not an allotrope of carbon. These distinctions show up in MCQs year after year.

Q1. Which metal is stored under kerosene to prevent reaction with air? A. Iron B. Zinc C. Sodium D. Aluminium Answer: C

Q2. Which allotrope of carbon conducts electricity? A. Diamond B. Charcoal C. Graphite D. Fullerene Answer: C

Q3. The compound CH₃COOH is known as: A. Ethanol B. Acetone C. Ethanoic acid D. Methanoic acid Answer: C

Fill in the Blank The ability of carbon to form long chains by bonding with itself is called __________. Answer: Catenation

True or False Silica is an allotrope of carbon. Answer: False

Most Repeated Topics Across All Seven Modules

Going through multiple years of NIOS Science 212 exam papers, these topics come back most consistently in the objective section.

Common Mistakes Students Make in Science 212 Exam

Confusing Thomson with Rutherford is the most common atomic structure error — Thomson discovered the electron, Rutherford the nucleus. Getting kinetic energy wrong when velocity changes because of not squaring the velocity correctly loses marks in Energy questions. Mixing up universal donor and universal recipient in blood group questions is a very avoidable mistake. Thinking a ceiling fan uses the heating effect of current — it does not — catches students in Electrical Energy. Assuming Silica is an allotrope of carbon because it sounds similar to Silicon trips students up in the Carbon chapter. Not preparing Module I and Module VII because they seem less technical results in easy marks being left on the table.

About Unnati Education – NIOS Support Since 2010

Unnati Education has been supporting NIOS students since 2010 and understands exactly what kind of preparation makes a real difference in this exam. For Science and Technology 212, we provide a complete chapter-wise objective question booklet covering all 32 lessons across all seven modules with clear answers and explanations. We also offer solved TMAs, previous year question papers with complete solutions, practical files, and chapter-wise notes — all updated for both the April and October 2026 NIOS exam cycles.

How to Get the Complete Solutions

If you want the full objective solution booklet for NIOS Class 10 Science 212 important questions for 2026, or if you need previous year question papers, solved TMAs, or any other study support, get in touch with Unnati Education. We will get you exactly what you need.

Phone and WhatsApp: 9654279279 or 9899436384

Website: unnatieducations.com/nios

Frequently Asked Questions

Q1. Are these NIOS Class 10 Science 212 important questions enough for the 2026 exam?

These chapter-wise questions cover key objective topics from all seven modules and 32 lessons of NIOS Science 212. They are a reliable and focused starting point for exam preparation. For the complete solution booklet with answers and explanations for every single chapter, contact Unnati Education at 9654279279 or 9899436384 and get your copy without any delay.

Q2. Where can I get or download the NIOS Science 212 important questions PDF for 2026?

Unnati Education provides a complete NIOS Science 212 important questions PDF with MCQs, fill in the blanks, and true or false questions with full answers from all chapters. Call or WhatsApp at 9654279279 or 9899436384 and our team will share the complete material with you quickly, directly, and without any unnecessary complications.

Q3. Does the Unnati Education booklet include numerical and diagram-based questions for Science 212?

Yes, the Unnati Education booklet for NIOS Science 212 covers numerical questions from Force and Motion, Gravitation, Work and Energy, and Electrical Energy, along with objective and concept questions from all 32 lessons. Contact us at 9654279279 or 9899436384 to get your complete 2026 solution booklet.

Q4. Can I get previous year question papers for NIOS Science 212 from Unnati Education?

Yes, Unnati Education provides previous year question papers with complete solutions for NIOS Science 212. These papers show you exactly how questions are phrased and what level of specificity the exam expects from each chapter. Call or WhatsApp at 9654279279 or 9899436384 to get the full paper set for the 2026 exam cycle along with all supporting material.

Q5. Is this booklet valid for both April and October 2026 NIOS Science exams?

Yes, the Unnati Education objective question booklet for NIOS Science 212 is fully valid for both the April and October 2026 exam cycles. All content follows the current NIOS syllabus and is reviewed and updated throughout the year. Whichever exam cycle you are appearing in, this booklet prepares you completely for the objective section of your paper.