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Home
Olympiad
Indian National Junior Science Olympiad

Indian National Junior Science Olympiad (INJSO) 

The Indian National Junior Science Olympiad stands tall as the epitome of excellence in the scientific field, with a soul of curiosity in young minds all over India. It is one of the most elite science competitions at the national level, providing a platform for budding scientists to demonstrate their intellect and step into scientific discovery.

1.0Download INJSO 2025 Paper Solutions prepared by ALLEN

2.0What is the INJSO?

INJSO is an annual science Olympiad that is conducted by HBCSE, a world-renowned science education, learning and research centre. INJSO is a multi-stage contest that tests the understanding of simple scientific principles by students in all possible areas of study: Physics, Maths, Biology, and Earth Science.

  • The top 300 children across the country who come out first in the NSEJS will attend to the Indian National Jr. Science Olympiad (INJSO), which IAPT organises.
  • The top 35 INJSO candidates are called to IISC Bangalore for the Stage 3 Orientation/Selection Camp. The students in Indian schools who are pursuing Class 10 or below are eligible to appear for the INJSO Examination.
  • The IJSO representatives are chosen from INJSO. The competition attempts to discover gifted science students, motivate them, and channel them into the research and scientific arena.

3.0INJSO Examination 2025 Overview

Host

Homi Bhabha Centre for Science Education

Examination

(INJSO) Indian National Junior Science Olympiad 2025

Registration Dates

No Separate Registration

INJSO 2025 Exam Date

03rd Feb 2025

Application Fee

Rs. 300/-

Application Mode

Online

4.0Stages of the INJSO

The INJSO typically comes in a multi-step form:

  • Stage 1: Regional Level—This is the pre-test held at the regional level in all the centres of India. It is a written examination where students are tested for their scientific knowledge and reasoning ability.
  • Stage 2: National Level Those students who top the regional stage get to sit for the national stage. This stage consists of a tougher written test and could have practical or experimental tests.
  • Stage 3: International Junior Science Olympiad (IJSO): The winners at the national level undergo another phase of screening, and they also have a chance to represent their countries in the International Junior Science Olympiad. Students at IJSO must undergo rigorous theory and practical exams from across the globe.

5.0Examination Dates

  • INJSO Indian National Junior Science Olympiad February 3, 2025.

6.0Exam Centers

List of Centers for INJSO Exam

Ahmedabad

Bengaluru

Ranchi

Bhopal

Bhubaneshwar

Chandigarh

Chennai 

Delhi

Guwahati

Hyderabad

Mumbai 

Jaipur

Kochi

Kolkata

Kota 

Lucknow

Nagpur 

Patna

7.0Exam Pattern for INJSO

Here is the Exam Pattern for Upcoming INJSO:

Duration of INJSO

3 Hrs

Syllabus

Follows NCERT Syllabus(Class 9 and 10 and also Higher Classes topics too)

Language

English & Hindi, Can be Choose During Registration

Number of Questions

35

8.0Eligibility Criteria

A student must meet the following criteria to be eligible for the INJSO.

  • Age Limit: Candidates should not have crossed 16 by January 1, 2024.
  • Candidates must have been of Class 10 or lower up to and on November 30, 2023.
  • Nationality: The candidate should be an Indian citizen residing in and studying in India.
  • Academic Status: At the end of the first semester, they must have at least 60% aggregate marks in class IX and this academic year.
  • A student cannot have done any subject in Class 10 before its due date.
  • Exemptions Previous Exams: Students must not have appeared in any previous International Junior Science Olympiads (IJSO) or have undergone any orientation or training programme in any subject of natural science at a higher level.

9.0Exam Pattern and Syllabus

The INJSO exam normally consists of two sections they are as follows:

Section 1- Consists 15 MCQs. The right answer will award with three marks, whereas the wrong answer will give you a negative mark (-1).

Section 2—Consists of 9 questions, each carry 5 Marks, and it does not contain any negative marking.

  • These questions would have one or more options correct.
  • There will be no partial marks for these questions; you will only get marks if you mark all the right answers.

Section 3- Consists of 11 question’s 

  • For all the questions in this section, the process involved in arriving at the solution is more important than the final answer. Valid assumptions/approximations are perfectly acceptable. So, write your method clearly, stating all the reasonings/assumptions/approximations.
  • If you fall short of writing space for any question, you can ask for an extra sheet. You can ask for a maximum of two additional sheets.

The INJSO syllabus generally follows the NCERT Syllabus for classes 9 and 10, and also includes higher-level questions too, The subject areas are:

Subject

Topics

Physics

  • Light- Concave Mirror, Deviation Through Two Plane Mirror, T.I.R, Shadow
  • Sound- Echo, Node & Anti Node
  • Electricity
  • Work, Power, Energy- Efficiency & Power
  • Magnetism, Gravitation
  • Simple Harmonic Motion- Simple Pendulum
  • Fluid- Floatation
  • Force
  • Heat- Radiation, Anomalous Behaviour of Water, Thermal Expansion
  • Rectilinear Motion- Velocity Motion, Newton’s Laws Of Motion
  • Unit Dimension
  • Electrostatics- Ohm’s Law, Coulomb’s Law, Combination Of Resistance, Potential

Mathematics

  • Permutation & Combination
  • Arithmetic Progression
  • Area Of Parallelogram & Triangles, Similar Triangles
  • Circle
  • Geometric Progression
  • Linear Equation In Two Variable
  • Number System
  • Quadratic Equation
  • Quadrilaterals
  • Ratio & Proportion
  • Trigonometry

Chemistry

  • Acids, Bases, And Salts
  • Analytical Science and Maths
  • Metals And Non-Metals
  • Mole Concept
  • Carbon
  • Study Of Gas Laws
  • Equivalent Concept
  • Periodic Table And Periodicity In Properties

Biology

  • Biodiversity- Chordates, Monera, Non-Chordates
  • Biotech- GMC (Genetically Modified Crops)
  • Control and Coordination- Endocrine System, Nerve conductor, Sympathetic Nervous System
  • Cell Biology- Cell Organelles, Types of Cell
  • Human Health & Diseases- Immunity
  • Reproduction- Asexual Reproductions
  • Heredity and Evolution- DNA Fingerprinting, DNA
  • Microbes in Human Welfare

10.0Registration Process

The registration process for INJSO generally involves the following steps:

  • Visit the official website. 
  • Go to the Olympiad section and find the upcoming events.
  • Fill out the registration form: All personal and academic details must be correctly mentioned when filling out the online application form. This information includes birth date, NSE centre code if the applicant has a code of identification and roll number.
  • Test Center Selection: Choose your exam centre.
  • Form Submission: Submit the fully completed registration form.

11.0Benefits of Participating in The INJSO

Participating in the INJSO has many advantages for young students:

  • Improved Scientific Knowledge: The intensive preparation and competition greatly improve students' knowledge of core scientific concepts in different fields.
  • Acquired critical thinking and problem-solving skills: INJSO develops students to be more reflective about complex problems, attempting to think creatively about such problems. All these will be vital inputs for students' academic and daily lives.
  • Increased Confidence and Self-Esteem: Success in the INJSO gives students confidence in their minds regarding their capability and reshapes their attitude towards following their scientific interests with greater passion.
  • Exposure to Scientific Research and Innovation: INJSO offers exposure to the students with the cutting-edge scientific research and contact with scientists and teachers.
  • Such appreciation from across the world provides international opportunities to achievers of the INJSO, such as being eligible for scholarships, research, and other scholarly advantages.

12.0Preparing for the INJSO

Preparing for the INJSO requires hard work and a strong foundation in science. Here are a few tips for an aspiring INJSO contestant.

  • In-depth conceptual understanding: Emphasis on developing a firm foundation in fundamental scientific concepts in physics, chemistry, biology, and earth sciences.
  • Regular Practice: Most tough problems have to be practiced regularly to develop problem-solving skills, quickness, and accuracy.
  • Refer to quality resources: Read textbooks, online sources, and reference materials to further your knowledge and investigate more complex topics.
  • Do Study Groups: Work through problems with a group of young scientists in problem-solving and learning from each other's experiences.
  • Seek Advice from Mentors: Seek advice from experienced teachers, scientists, or mentors that can give constructive criticism and direction

13.0Conclusion

The Indian National Junior Science Olympiad emanates from the fact that the Indian youth can accomplish much. It fosters scientific excellence and sets afresh a new age of scientists studying the universe's wonders and advancing human knowledge. As such, it promotes young talent and, through that, promotes scientific culture building. INJSO has very key roles to play for India in the field of science and technology.

Olympiad Exams

Class 6 Olympiad

Class 7 Olympiad

Class 8 Olympiad

Class 9 Olympiad

Class 10 Olympiad


Subject-wise Olympiad Exams

Science Olympiad Exam

Social Science Olympiad Exam

English Olympiad Exam

Maths Olympiad Exam


National Olympiads

National Level Science Talent Search Exam

INPhO (Indian National Physics Olympiad) 

INChO (Indian National Chemistry Olympiad)

INAO (Indian National Astronomy Olympiad)

INJSO (Indian National Junior Science Olympiad)

National Science Olympiad

Indian National Mathematical Olympiad

National Standard Examination in Physics

National Standard Examination in Biology

National Standard Examination in Chemistry

National Standard Examination in Junior Science

National Standard Examination in Astronomy


International Olympiads

International Junior Science Olympiad

International Junior Physics Olympiad

International Chemistry Olympiad

International Mathematics Olympiad

International Biology Olympiad

International Computer Science Olympiad

Frequently Asked Questions

Students must be below 16 years of age on January 1 of the exam year and be studying in class 10 or below as of November 30 of the exam year. Students need to have secured at least 60% marks in Class IX and the current academic year up to the end of the first semester. Indian students must not have previously participated in the International Junior Science Olympiad (IJSO) or undergone higher-level science training programs.

The exam typically consists of multiple-choice questions (MCQs), numerical problems, and theoretical questions requiring detailed explanations. The syllabus covers many Physics, Chemistry, Biology. The exam is conducted in English and Hindi.

1. Build a strong foundation in fundamental scientific concepts by thoroughly studying NCERT textbooks and other relevant resources. 2. Solve various challenging problems regularly to improve problem-solving skills and speed. 3. Focus on understanding the underlying concepts rather than memorizing facts. 4. Seek guidance from experienced teachers or mentors or join study groups for peer learning and discussion.

1. Students can develop critical thinking and problem-solving skills. 2. Increased Confidence: Boosts confidence and self-esteem. 3. Exposure to Science: Provides exposure to scientific research and innovation. 4. International Recognition: Offers opportunities for international recognition and future academic pursuits.

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