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INO Exam 2023

Indian National Olympiad (INO 2023) is the second stage for all students interested in participating in International Science Olympiad for any subject.

Indian National Olympiad

The exam is conducted by Homi Bhabha Centre for Science Education, TIFR, MumbaiThe IOQ will be jointly organized by the Indian Association of Physics Teachers (IAPT), the Association of Chemistry Teachers (ACT), the Association of Teachers in Biological Sciences (ATBS), and the Homi Bhabha Centre for Science Education (Tata Institute of Fundamental Research) – HBCSE (TIFR). The academic responsibility of Part I: NSE will be borne by IAPT, ACT, and ATBS while that of Part II: INO will be borne by HBCSE. The remaining stages of the Olympiad program will be carried out by HBCSE.

Please Note: Students will be allowed to leave the examination at the end of Part I which is NSE of IOQ if they so wish. However, they will not be admitted to appear only in Part II which is INO.

INO 2023-24 Exam Dates

Given below are the important dates of the IOQ Exams

INO Exam Dates


Dates (Tentative)

Indian Olympiad Qualifier in Junior Science (IOQJS)

Nov 26, 2023

Indian Olympiad Qualifier in Physics (IOQP)

Nov 26, 2023 

Indian Olympiad Qualifier in Biology (IOQB)

Nov 26, 2023

Indian Olympiad Qualifier in Astronomy (IOQA)

Nov 25, 2023

Indian Olympiad Qualifier in Chemistry (IOQC)

Nov 26, 2023

INO Exam Centers

The exam is conducted in limited centers all over India, and students have to select the location when they register for INO Exam 2023-24 for that particular subject. The different locations which conduct INO Exam 2023-24 are:

INO Exam Centers



















INO 2023-24 Exam Eligibility Criteria

Indian National Olympiad (INO) is the second stage after NSE. About 300 students per subject (500 in Astronomy) are selected to write the INO Exam 2023-24.

  • Students will be eligible for INO (in the particular subject) if they score equal to or greater than the Minimum Admissible Score (MAS). The MAS for a given subject will be 50% of the average of the top ten scores in that subject.
  • Students who score above the merit index will automatically qualify for INO stage II of ISO for each subject. The merit index in a subject is defined as 80% of the average of the top ten scores in that subject rounded off to the nearest lower integer.
  • The quota for each state and Union Territory will be similar to the student's quota, as decided by the National Talent Search Examination (NTSE). The total number of students to be selected per subject is 300 ( 500 for Astronomy).
  • A minimum of one student must be selected from each state or Union Territory.
  • As per HBCSE norms, 300 students should be selected for the INO stage 2 exam. In case the norms are not met, the additional students will be selected purely merit-wise, provided they score more than the Minimum Admissible Score (MAS) until the target number of 300 students is reached.
  • Students who have already represented India in the International Olympiad (IOAA, IBO, IChO, IJSO, IPhO, APhO, or IAO- Jr) need not appear for NSE for that particular subject. Such students can send a written request to the National Coordinator to directly sit for the second stage, i.e., the Indian National Olympiad.

Eligibility for Astronomy (INAO)

The student appearing for NSEA will be divided into two groups:

  • Group A consists of students who are in class 12 as of November 30, 2023.
  • Group B consists of students who are in class 11 or lower as of November 30, 2023.

For Stage II (INAO), a target number of 250 students will be selected from each group. Merit Index (MI) and Minimum Admissible Score (MAS) will be calculated separately for each group. All the criteria mentioned above will be applied separately to each group.

INO Exam Results

Given below are the steps to apply for INO Exam results.

  • Go to the HBCSE website.
  • Find the link on the home page, which is said INO results.
  • Students are redirected to another page.
  • Log in by filling in the roll number, date of birth, and captcha. These details must be the same as those filled during registration.
  • Students will be accessible to download the respective performance card, certificates of merit, and invitation letters.

The final list selected for OCSC (after revaluation and checking of all the eligibility criteria) will be given on the HBCSE website as a separate link. Students who have checked the results using the above procedure should confirm their selection using the list. Students can use their roll number to check if they are selected.

Note: Apart from International Science Olympiad, HBCSE also conducts International Mathematical Olympiad. Students can also check out the list of Olympiad Exams conducted in India on national and international levels.

INO Exam 2023-24 Awards

A certificate of merit will be given to each student with marks equal to or higher than the cutoff marks for OCSC selection. A merit certificate will be provided to the students, irrespective of whether they have been invited for OCSC.

These certificates will be handed over to students at HBCSE at the time of OCSCs or sent by post later on.

Stages in ISO

Each student who wants to represent the country for any one of the groups of exams under ISO 2023-24 must go through the following stages. It is mandatory to qualify each step serially. The level of difficulty also increases as the student starts succeeding in stages.

Stages in INO



Stage I

National Standard Examination (NSE)

Stage II

Indian National Olympiad (INO)

Stage III

Orientation cum Selection Camp (OCSC)

Stage IV

Pre Departure Training Camp (PDTC)

Stage V

International Science Olympiad (IMO)

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