SOF ISO Question Paper 2026-27: Class 1 to 12 PDFs, Answer Key
The International Science Olympiad (ISO) 2026-27 will be conducted by the Science Olympiad Foundation (SOF) on October 30, November 19, and December 3, 2026. ISO is a Science Olympiad exam that is conducted for students of Classes 1 to 12. The ISO syllabus includes Science, logical reasoning, and thinking skills in general. The questions asked in ISO for Classes 1 to 10 include Logical Reasoning, which is different from what is asked in Classes 11 and 12, which are Physics and Chemistry.
This Story also Contains
- ISO Exam 2026-27: Overview
- ISO Question Paper 2026-27 PDF Download
- SOF ISO Answer Key 2026-27 PDF Download
- SOF ISO Question Paper Pattern 2026-27
- SOF ISO 2026-27 Preparation Tips
This article is for students who are preparing for the ISO 2026-27 exam. Students will be able to find the 2026-27 question paper with the answer key right after the exam is over. For practice, students can also download the previous years' question papers and follow the preparation tips listed for knowledge. Students who are giving ISO for the first time can go through the article below to get a general idea of this exam and the exam pattern.
ISO Exam 2026-27: Overview
Students can check the important details of the ISO examination in the table below.
Particulars | Details |
Exam Name | International Science Olympiad (ISO) |
Conducting Authority | Science Olympiad Foundation (SOF) |
Academic Year | 2026-27 |
Classes | 1 to 12 |
Exam Level | Level 1 and Level 2 |
Level 1 Exam Dates | October 30, November 19, and December 3, 2026 |
Exam Mode | Offline |
Question Type | Multiple Choice Questions |
Exam Duration | 1 Hour |
Medium | English |
Registration | Through Schools |
Level 2 Classes | 3 to 12 |
ISO Question Paper 2026-27 PDF Download
The ISO Question Paper 2026 PDF will be made available in the table below right after the respective examination is conducted. Students should make sure the question paper they are checking is for their exact exam date, as the question paper varies according to dates.
ISO Class | Question Paper PDF |
ISO Class 1 Question Paper 2026-27 | Coming Soon |
ISO Class 2 Question Paper 2026-27 | Coming Soon |
ISO Class 3 Question Paper 2026-27 | Coming Soon |
ISO Class 4 Question Paper 2026-27 | Coming Soon |
ISO Class 5 Question Paper 2026-27 | Coming Soon |
ISO Class 6 Question Paper 2026-27 | Coming Soon |
ISO Class 7 Question Paper 2026-27 | Coming Soon |
ISO Class 8 Question Paper 2026-27 | Coming Soon |
ISO Class 9 Question Paper 2026-27 | Coming Soon |
ISO Class 10 Question Paper 2026-27 | Coming Soon |
ISO Class 11 Question Paper 2026-27 | Coming Soon |
ISO Class 12 Question Paper 2026-27 | Coming Soon |
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SOF ISO Answer Key 2026-27 PDF Download
The ISO Answer Key 2026-27 will be provided right after the exam is over, and students will be able to download the PDF from the table given below. Students must then estimate their marks by recalling their answers and checking them with the answer key below. This is important as it can help the students know if or not they might qualify for the next round and begin their preparation early on.
Title | ISO Answer Key 2026-27 |
ISO Class 1 Answer Key 2026-27 | Coming Soon |
ISO Class 2 Answer Key 2026-27 | Coming Soon |
ISO Class 3 Answer Key 2026-27 | Coming Soon |
ISO Class 4 Answer Key 2026-27 | Coming Soon |
ISO Class 5 Answer Key 2026-27 | Coming Soon |
ISO Class 6 Answer Key 2026-27 | Coming Soon |
ISO Class 7 Answer Key 2026-27 | Coming Soon |
ISO Class 8 Answer Key 2026-27 | Coming Soon |
ISO Class 9 Answer Key 2026-27 | Coming Soon |
ISO Class 10 Answer Key 2026-27 | Coming Soon |
ISO Class 11 Answer Key 2026-27 | Coming Soon |
ISO Class 12 Answer Key 2026-27 | Coming Soon |
Also Read: ISO Answer Key 2026-27
SOF ISO Question Paper Pattern 2026-27
The ISO Level 1 examination will have questions entirely in the form of Multiple Choice Questions (MCQs) and is given a time limit of one hour. Classes 1 to 4 have 35 questions carrying 40 marks, while Classes 5 to 12 have 50 questions carrying 60 marks. A breakdown of marks for each class group is given for the students below:
ISO Classes 1 to 4
Section | No. of Questions | Marks per Question | Total Marks |
Logical Reasoning | 5 | 1 | 5 |
Science | 25 | 1 | 25 |
Achievers Section | 5 | 2 | 10 |
Total | 35 | — | 40 |
ISO Classes 5 to 10
Section | No. of Questions | Marks per Question | Total Marks |
Logical Reasoning | 10 | 1 | 10 |
Science | 35 | 1 | 35 |
Achievers Section | 5 | 3 | 15 |
Total | 50 | — | 60 |
ISO Classes 11 and 12
For Classes 11 and 12, the question paper has a different subject distribution.
Section | No. of Questions | Marks per Question | Total Marks |
Physics and Chemistry | 25 | 1 | 25 |
Mathematics/Biology | 20 | 1 | 20 |
Achievers Section | 5 | 3 | 15 |
Total | 50 | — | 60 |
SOF ISO 2026-27 Preparation Tips
Students can follow the preparation tips given below to prepare for the International Science Olympiad:
Understand the Science concepts instead of memorising answers.
Revise the current class syllabus thoroughly.
Also revise important topics from the previous class.
Practise Logical Reasoning questions regularly.
Solve ISO sample papers after completing the syllabus.
Give extra attention to the Achievers Section.
Practise application-based Science questions.
Make short notes of important scientific concepts.
Revise important diagrams and processes.
Solve previous-year question papers.
Attempt mock tests within the one-hour time limit.
Analyse incorrect answers after every practice test.
Maintain a separate list of difficult questions.
Work on speed as well as accuracy.
Read each question carefully before selecting an option.
