Announcements for INO and OCSC 2024

  • Click here to see the OCSC list in various science subjects.
  • Check your INO score here.

INO Question papers and Frozen solutions (updated on Feb 19, 2024)

INO question papers and solutions are the intellectual property of HBCSE. Any versions of the same published by any agency other than HBCSE are illegal and constitute an infringement of copyright. Distribution and use of such versions constitute illegal acts, and are liable to be prosecuted. HBCSE reserves the right to disqualify any student from the Olympiad programme on such grounds.

Subject Question paper (English) Question paper (Hindi) Solution
Astronomy QP (E) QP (H) Solutions
Biology QP (E) QP (H) Solutions
Chemistry QP (E) QP (H) Solutions
Physics QP (E) QP (H)  Solutions

Any alternative method of solution to any question that is scientifically and mathematically correct and leads to the same answer is accepted with full credit. Partially correct answers will receive partial credit. For questions requiring reasoning or calculations, full credit is given only if adequate justification and the necessary steps of the calculations are provided in writing.

For the Question Paper and Solution of INJSO 2024, please refer to the IAPT JSO website.

Schedule of the Indian National Olympiad (INO):

Astronomy (INAO): Saturday, February 03, 2024 09.00 a.m. – 12.00 noon
Chemistry (INChO): Saturday, February 03, 2024 01.30 p.m. – 04.30 p.m
Physics (INPhO): Sunday, Febraury 04, 2024 09.00 a.m. – 12.00 noon
Biology (INBO): Sunday, Febraury 04, 2024 01.30 p.m. – 03.30 p.m.

Tentative schedule for INO-related actions:

Mandatory registration for students on INO website: January 12 -18, 2024 
Hall Tickets available for download: January 23, 2024 
INO examinations: February 03-04, 2024
Question papers and provisional solutions on HBCSE website: February 06, 2024
Comments on provisional solutions: February 06-10, 2024
INO marks and frozen solutions on HBCSE website: February 20, 2024
Reevaluation request: February 20 – 26, 2024
INO final results and OCSC lists: March 05, 2024

Tentative dates for OCSC/IMOTC:

Astronomy: May 02 -19, 2024
Biology: May 13 – 22, 2024
Chemistry: April 29 – May 10, 2024
Physics: April 17-30, 2024
Mathematics (IMOTC): May 07-31, 2024 (CMI, Chennai)


  1. Students taking any external examination during OCSC camp dates are requested to select Mumbai as their exam centre. Efforts will be made to accommodate such exam schedules in the OCSC programme.’
  2. All stages of the Junior Science Olympiad will be handled by the Indian Association of Physics Teachers (IAPT). All queries related to Junior Science Olympiad should be directed to . The conduct of examination, evaluation of INJSO and selection for OCSC (JS) are the responsibility of IAPT, and more information can be found on this website.
  3. Candidates for INJSO 2024 are automatically eligible for consideration for the next stages of selection of the Indian team for the International Olympiad on Astronomy and Astrophysics (IOAA-Junior). The selection for the next stages of this programme will be based on performance in INJSO 2024 from among candidates who express their interest in this programme during INO registration. This programme is conducted by the National Council of Science Museums (NCSM) and more information is available at