INJSO: syllabus, mock tests and practice
Indian National Junior Science Olympiad — Stage 2 of India's Junior Science Olympiad programme, conducted by IAPT. Top scorers are selected to represent India at the International Junior Science Olympiad (IJSO). For students up to Class X.
- Classes
- Grade 7, Grade 8, Grade 9, Grade 10
- Syllabus years
- 2026-27
- Mock tests
- 15
- Downloads
- 30
About the INJSO exam
How the exam works
INJSO is the national second-stage Junior Science Olympiad. Entry comes through NSEJS qualification and any officially permitted exemptions. IAPT administers the Junior Science route; HBCSE expressly says it does not administer NSEJS/INJSO. A 2027 paper pattern and exact duration were not independently verified; consult IAPT's new notice when released.
Who can apply
The IAPT 2026–27 portal lists NSEJS birth dates 1 January 2012–31 December 2013 and Classes 8, 9 or 10, subject to all current rules. INJSO additionally requires selection through the Junior Science programme. Junior and Senior Science enrolments cannot be combined in the same cycle.
When it happens
NSEJS: 22 November 2026, 14:30–16:30 IST. The exact INJSO 2027 date was not verified. IAPT's Junior Science site still displays a previous-cycle 1 February 2026 notice, which must not be reused as the upcoming date. NSE enrolment for this cycle is closed. Checked 1 November 2026.
How to register
For the NSE stage, register through an approved centre or IAPT's self-enrolment portal during the published window; the 2026 fee was ₹300 per subject. Keep personal/parent details, school details and valid identity proof ready. This cycle's entry window is closed. Shortlisted Junior Science pupils must follow IAPT's INJSO registration/admit-card notice.
Official website, syllabus and past papers
Junior Science covers science and mathematics through Class 10, including lower-class material; Olympiad problems can be substantially harder than routine school questions.
INJSO syllabus
INJSO syllabus, All classes · 2026-27
Physics
- Motion and Force: Study distance, displacement, speed, velocity and acceleration, with graphs and the equations of motion. Apply Newton's laws of motion and momentum to everyday problems.
- Gravitation: Learn the universal law of gravitation, free fall, mass and weight. Study thrust, pressure, Archimedes' principle and buoyancy.
- Work, Energy and Power: Calculate work, power, kinetic and potential energy. Use the law of conservation of energy and the commercial unit of energy.
- Sound: Study how sound is produced and travels, its characteristics, reflection and echoes, the range of hearing, and ultrasound with its uses.
- Electricity: Learn electric current, potential difference, Ohm's law and resistance. Solve series and parallel circuits and study heating effect and electric power.
- Magnetic Effects of Electric Current: Study magnetic fields and field lines, the field due to a current-carrying conductor, electromagnetic induction, electric motors, generators and household circuits.
- Light: Reflection and Refraction: Learn reflection, spherical mirrors, refraction and lenses. Study the human eye, defects of vision, dispersion and atmospheric refraction.
- Sources of Energy: Compare fossil fuels with solar, wind, hydro, tidal, geothermal and nuclear energy, and discuss their uses and limits.
Chemistry
- Matter: Nature and Behaviour: Study solids, liquids and gases, the particle nature of matter, change of state and evaporation with the factors that affect it.
- Mixtures, Solutions and Separation: Learn elements, compounds and mixtures, colloids and suspensions, concentration of solutions and ways to separate the parts of a mixture.
- Structure of Atom and Molecules: Learn atoms and molecules, protons, neutrons and electrons, valency, atomic and mass numbers and isotopes.
- Mole Concept and Atomic Masses: Study the law of constant proportions, atomic and molecular masses, and how the mole relates to mass and number of particles.
- Chemical Reactions: Separate elements, compounds and mixtures. Study types of chemical reactions, balancing equations, oxidation and reduction.
- Acids, Bases and Salts: Learn the properties of acids, bases and salts, the pH scale and common compounds such as sodium hydroxide, sodium chloride and baking soda.
- Metals and Non-metals: Compare the physical and chemical properties of metals and non-metals, the reactivity series, and how metals are extracted and protected from corrosion.
- Carbon Compounds: Study carbon's catenation and allotropes, hydrocarbons, functional groups, and ethanol, ethanoic acid and soaps.
- Periodic Classification of Elements: Learn early attempts at classification (Dobereiner, Newlands, Mendeleev), the modern periodic table and trends in valency and metallic character.
Biology
- Cell Structure and Function: Learn the cell as the basic unit of life, prokaryotic and eukaryotic cells, organelles and their functions, and cell division by mitosis and meiosis.
- Tissues: Study plant tissues (meristematic and permanent) and animal tissues (epithelial, connective, muscular and nervous).
- Diversity in Living Organisms: Learn the five kingdom classification, the hierarchy of classification, binomial nomenclature and the main groups of plants and animals.
- Health and Diseases: Study health, infectious and non-infectious diseases, those caused by viruses, bacteria and protozoans, and how they are prevented and treated.
- Nutrition: Study autotrophic and heterotrophic nutrition, photosynthesis, and nutrition and digestion in animals and humans.
- Respiration: Learn the types of respiration, the human respiratory system, exchange of gases and cellular respiration.
- Transportation: Study transport in plants and the human circulatory system, blood and its components, and the lymphatic system.
- Excretion: Learn how plants and animals remove wastes, the human excretory system and dialysis.
- Control and Coordination: Study the nervous system, reflex action, hormones and the endocrine system, and coordination in plants.
- Reproduction: Compare asexual and sexual reproduction. Learn vegetative propagation, pollination and fertilization in plants and the human reproductive system.
- Heredity and Evolution: Study heredity, variation, Mendel's laws, sex determination, and the evidence and theories of evolution.
- Our Environment: Learn ecosystems, food chains and webs, the ozone layer, waste management and air, water and soil pollution.
- Biogeochemical Cycles and Physical Resources: Learn about air, water and soil as resources and the water, oxygen, carbon and nitrogen cycles in nature.
- Management of Natural Resources: Study air, water, soil and forests as resources, sustainable management and conservation of biodiversity.
- Food Production: Learn crop production and improvement, animal husbandry and sustainable use of food resources.
Mathematics
- Number Systems and Arithmetic: Work with integers, rational and irrational numbers, factors, multiples, ratios, percentages and exponents. Solve word problems on speed, time, work and mixtures.
- Algebra: Polynomials and Equations: Use algebraic identities and factorisation of polynomials. Solve linear equations in one and two variables and quadratic equations.
- Geometry: Triangles and Circles: Study lines and angles, congruence and similarity of triangles, the Pythagoras theorem, circle theorems and tangents.
- Mensuration: Calculate perimeters, areas, surface areas and volumes of plane figures and common solids such as cubes, cylinders, cones and spheres.
- Coordinate Geometry and Trigonometry: Plot points and find distances on the coordinate plane. Learn trigonometric ratios, identities and simple heights-and-distances problems.
- Statistics and Probability: Find mean, median and mode from data, read graphs and tables, and solve simple probability problems.
Rounds and levels
- 2026-27: Practice for INJSO 2026-27.
- Previous-year papers: Past INJSO question papers.
More exams on SkillStar
INJSO: questions parents ask
- Which classes can prepare for INJSO on SkillStar?
- INJSO practice on SkillStar is arranged for Grade 7, Grade 8, Grade 9 and Grade 10. Each child sees what's right for their own class.
- What is in the INJSO syllabus for 2026-27?
- 38 topics in Physics, Chemistry, Biology and Mathematics, laid out subject by subject on this page. On SkillStar your child can tick off each topic as they learn it.
- Are there INJSO mock tests on SkillStar?
- Yes, 15 mock tests. Each one is marked the moment your child finishes, with a question-by-question review, and can be taken again as often as they like.
- Can I download INJSO papers?
- Yes. The INJSO Downloads tab on SkillStar has 30 files for this exam.
- How does my child start INJSO practice?
- Sign up free as a parent, add your child with their class, and pick INJSO from the exam list. Every new family gets welcome credits, lots of content costs nothing, and anything paid shows its price in credits before you decide.
- Is SkillStar the official INJSO website?
- No. SkillStar is an independent practice platform and is not affiliated with, or endorsed by, the organisers of these exams. Exam names belong to their respective owners. Check dates, fees and registration with the INJSO organisers.
SkillStar is an independent practice platform and is not affiliated with, or endorsed by, the organisers of these exams. Exam names belong to their respective owners.