iOS 2026-27 - Silverzone Foundation conducts the International Olympiad of Science 2026-27 exam. The iOS examination, which takes place annually, aims to test students' competency in science and is based on the syllabus provided by CBSE/ICSE and other State Boards. The iOS exam 2026-27 is held in the English medium only at the National and International levels. The last date to register for the Silverzone IOS Olympiad is August 31, 2026.
Schools decide the exam date for their students. Students can register for iOS 2026-27 through their schools. Individual registrations by students are not accepted. Classes 1 to 12 can participate in the International Olympiad of Science 2026-27. The exam is conducted at three levels.
More Details on Silverzone iOS exam 2026-27:

| Full Exam Name | International Olympiad of Science |
| Short Exam Name | iOS |
| Conducting Body | SilverZone Foundation |
| Frequency Of Conduct | Once a year |
| Exam Level | Intermediate |
| Languages | English |
| Mode Of Application | offline |
| Application Fee | Offline : 125 |
| Mode Of Exam | offline |
| Exam Duration | 1 Hour |
iOS International Olympiad of Science (session 2026)
Students must follow the iOS 2026-27 exam pattern mentioned below while preparing for the exam. For the ease of students, we have listed the paper pattern of the iOS exam 2026-27 for all the classes separately.
IOS Class 1 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Living and Non-Living Things | 2 | 3.5 | 7 |
| Plants and Animals | 5 | 3.5 | 17.5 |
| Food and clothes | 2 | 3.5 | 7 |
| Our environment | 2 | 3.5 | 7 |
| Our surroundings | 2 | 3.5 | 7 |
| Human body | 2 | 3.5 | 7 |
| Reasoning and Aptitude | 5 | 4 | 20 |
| Scholar’s Zone | 5 | 5.5 | 27.5 |
IOS Class 2 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Living and Non- Living Things | 2 | 3.5 | 7 |
| Plants and Animals | 4 | 3.5 | 14 |
| Our Environment | 3 | 3.5 | 10.5 |
| Our Universe | 2 | 3.5 | 7 |
| Food and Clothes | 2 | 3.5 | 7 |
| Our Body | 2 | 3.5 | 7 |
| Reasoning and Aptitude | 5 | 4 | 20 |
| Scholar’s Zone | 5 | 5.5 | 27.5 |
IOS Class 3 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Living and Non-Living Things | 2 | 3 | 6 |
| Plants and Animals | 6 | 3 | 18 |
| Matter, Motion and Transport | 4 | 3 | 12 |
| Environment and Universe | 5 | 3 | 15 |
| Our Body | 3 | 3 | 9 |
| Reasoning and Aptitude | 5 | 3.5 | 17.5 |
| Scholar’s Zone | 5 | 4.5 | 22.5 |
IOS Class 4 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Human Body | 3 | 3 | 9 |
| Rocks and Soil | 2 | 3 | 6 |
| Environment and Universe | 4 | 3 | 12 |
| Plants and Animals | 6 | 3 | 18 |
| Work, Force and Energy | 3 | 3 | 9 |
| Matter | 2 | 3 | 6 |
| Reasoning and Aptitude | 5 | 3.5 | 17.5 |
| Scholar’s Zone | 5 | 4.5 | 22.5 |
IOS Class 5 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Matter | 2 | 3 | 6 |
| Environment and Natural Calamities | 4 | 3 | 12 |
| Plants and Animals | 6 | 3 | 18 |
| Light and Sound | 2 | 3 | 6 |
| Our Body and Nutrition | 3 | 3 | 9 |
| Work and Energy | 3 | 3 | 9 |
| Reasoning and Aptitude | 5 | 3.5 | 17.5 |
| Scholar’s Zone | 5 | 4.5 | 22.5 |
IOS Class 6 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Food | 2 | 2.5 | 5 |
| Materials | 4 | 2.5 | 10 |
| Living World | 6 | 2.5 | 15 |
| Motion and Measurement | 2 | 2.5 | 5 |
| How Things Works | 7 | 2.5 | 17.5 |
| Air | 2 | 2.5 | 5 |
| Reasoning and Aptitude | 7 | 3 | 21 |
| Scholar’s Zone | 5 | 4.3 | 21.5 |
IOS Class 7 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| How Stuff Works | 6 | 2.5 | 15 |
| Living World | 6 | 2.5 | 15 |
| Materials | 6 | 2.5 | 15 |
| Natural Resources | 2 | 2.5 | 5 |
| Food | 3 | 2.5 | 7.5 |
| Reasoning and Aptitude | 7 | 3 | 21 |
| Scholar’s Zone | 5 | 4.3 | 21.5 |
IOS Class 8 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Food | 4 | 2.5 | 10 |
| How Stuff Works | 8 | 2.5 | 20 |
| Living World | 6 | 2.5 | 15 |
| Materials | 3 | 2.5 | 7.5 |
| Natural Phenomena | 2 | 2.5 | 5 |
| Reasoning and Aptitude | 7 | 3 | 21 |
| Scholar’s Zone | 5 | 4.3 | 21.5 |
IOS Class 9 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Matter | 3 | 2 | 6 |
| Atoms & Molecules | 5 | 2 | 10 |
| Living World | 5 | 2 | 10 |
| Food | 2 | 2 | 4 |
| Force & Motion | 6 | 2 | 12 |
| Work & Energy | 4 | 2 | 8 |
| Reasoning and Aptitude | 10 | 3 | 30 |
| Scholar’s Zone | 5 | 4 | 20 |
IOS Class 10 Syllabus and Marking Scheme
| Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|
| Chemical Elements and Their Properties | 8 | 2 | 16 |
| Life Processes | 6 | 2 | 12 |
| Heredity And Evolution | 2 | 2 | 4 |
| Light And Electricity | 8 | 2 | 16 |
| Environment | 1 | 2 | 2 |
| Reasoning and Aptitude | 10 | 3 | 30 |
| Scholar’s Zone | 5 | 4 | 20 |
IOS Class 11 PCB Syllabus and Marking Scheme
| Section | Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|---|
| Physics | Unit and Measurement Kinematics Laws of Motion Work, Energy and Power Motion of System of Particles and Rigid Body Gravitation Properties of Bulk Matter Thermodynamics Behaviour of Perfect Gases and Kinetic Theory Oscillations and Waves | 10 | 2.5 | 25 |
| Chemistry | Some Basic Concepts of Chemistry Structure of Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure Thermodynamics Equilibrium Redox Reactions Organic Chemistry – Some Basic Principles and Techniques Hydrocarbons | 10 | 2.5 | 25 |
| Reasoning and Aptitude | Reasoning and Aptitude | 10 | 2.5 | 25 |
| Biology | Diversity in the Living World Structural Organisation in Plants & Animals Cell: Structure and Functions Plants physiology Human physiology | 10 | 2.5 | 25 |
IOS Class 11 PCM Syllabus and Marking Scheme
| Section | Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|---|
| Physics | Unit and Measurement Kinematics Laws of Motion Work, Energy and Power Motion of System of Particles and Rigid Body Gravitation Properties of Bulk Matter Thermodynamics Behaviour of Perfect Gases and Kinetic Theory Oscillations and Waves | 10 | 2.5 | 25 |
| Chemistry | Some Basic Concepts of Chemistry Structure of Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure Thermodynamics Equilibrium Redox Reactions Organic Chemistry – Some Basic Principles and Techniques Hydrocarbons | 10 | 2.5 | 25 |
| Mathematics | Sets and function Algebra Coordinate Geometry Calculus Statistics and Probability | 10 | 2.5 | 25 |
| Reasoning and Aptitude | Reasoning and Aptitude | 10 | 2.5 | 25 |
IOS Class 12 PCB Syllabus and Marking Scheme
| Section | Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|---|
| Physics | Electrostatics Current Electricity Magnetic Effects of Current and Magnetism Electromagnetic Induction and Alternating Currents Electromagnetic Waves Optics Dual Nature of Matter and Radiation Atoms and Nuclei Electronic Devices | 10 | 2.5 | 25 |
| Chemistry | Solutions Electrochemistry Chemical Kinetics The d and f Block Elements Coordination Compounds Organic Compounds Containing Halogens (Haloalkanes and Haloarenes) Organic Compounds Containing Oxygen (Alcohols, Phenols, Ethers, Aldehydes, Ketones and Carboxylic Acids) Organic Compounds Containing Nitrogen (Amines) Biomolecules | 10 | 2.5 | 25 |
| Reasoning and Aptitude | Reasoning and Aptitude | 10 | 2.5 | 25 |
| Biology | Reproduction Genetics and Evolution Biology and Human welfare Biotechnology Ecology | 10 | 2.5 | 25 |
IOS Class 12 PCM Syllabus and Marking Scheme
| Section | Unit | No. of Questions | Marks | Total Marks |
|---|---|---|---|---|
| Physics | Electrostatics Current Electricity Magnetic Effects of Current and Magnetism Electromagnetic Induction and Alternating Currents Electromagnetic Waves Optics Dual Nature of Matter and Radiation Atoms and Nuclei Electronic Devices | 10 | 2.5 | 25 |
| Chemistry | Solutions Electrochemistry Chemical Kinetics The d and f Block Elements Coordination Compounds Organic Compounds Containing Halogens (Haloalkanes and Haloarenes) Organic Compounds Containing Oxygen (Alcohols, Phenols, Ethers, Aldehydes, Ketones and Carboxylic Acids) Organic Compounds Containing Nitrogen (Amines) Biomolecules | 10 | 2.5 | 25 |
| Reasoning and Aptitude | Reasoning and Aptitude | 10 | 2.5 | 25 |
| Mathematics | Relation and function Algebra Calculus Vectors and Three-Dimensional Geometry Linear programming Probability | 10 | 2.5 | 25 |
Class-2: Unit 03
Class-6: Unit 02
Class-6: Unit 05
Class-7: Unit 02
Class-7: Unit 03
Class-8: Unit 03
Class-8: Unit 04
Class-8: Unit 05
Class-10: Unit 01
Class-10: Unit 02
Class-10: Unit 05
Class-11 PCB: Unit 01
Class-11 PCB: Unit 02
Class-11 PCB: Unit 04
Class-11 PCM: Unit 01
Class-11 PCM: Unit 02
Class-11 PCM: Unit 04
Class-12 PCB: Unit 01
Class-12 PCB: Unit 02
Class-12 PCB: Unit 04
Class-12 PCM: Unit 01
Class-12 PCM: Unit 02
Class-12 PCM: Unit 04
To prepare for iOS 2026-27, students must thoroughly prepare the CBSE/ICSE/State board syllabus and also start solving sample papers or previous years' question papers on iOS.
The SilverZone Foundation will release the IOS answer key 2026-27 for level 1 within 30 days after the exam. Candidates can visit the official website at silverzone.org/answer-key to access and download the IOS 2026 answer key.
The iOS result 2026-276 level 1 will be announced in January 2027, in online mode on the official website. Shortlisted students will appear for the iOS 2026-27 level 2 exam in March 2027. The result for level 2 will be declared in March 2027. Last year, the IOS results were declared on January 16, 2026.
The IOS Level 3 exam will be conducted in May/June 2027, and the results for the same will be declared by August/September 2027. Students who qualify will be awarded scholarships as follows -
Certificates and awards- level 1
| Rank. No. | Class | Award |
|---|---|---|
| 4th to 10th Olympiad rank | 1st to 12th | 4th to 10th Intl. Olympiad rank holders in each class will be awarded a Gift Certificate of a different value. |
| 11th to 25th Olympiad rank | 1st to 12th | 11th to 25th Intl. Olympiad rank holders in each class will be awarded a Gift Certificate of a different value. |
| 26th to 500th Olympiad rank | 1st to 12th | 26th to 500th Intl. Olympiad rank holders in each class will be awarded a Topper Achievement Certificate. |
| 1th, 2th and 3rd Zonal Rank | 1st to 12th | All Zonal Rank 1st, 2nd 3rd rank holders of all classes will be awarded Medals of Excellence |
| 1th, 2th and 3rd State Rank | 1st to 12th | All State Rank 1st, 2nd 3rd rank holders of all classes will be awarded Medals of Excellence |
| 1st, 2nd 3rd Class Topper | 1st to 12th | Class Topper 1st, 2nd 3rd rank holders of every class of each school will be awarded with Medals of Excellence, provided the topper obtains at least 50% marks |
| All | 1st to 12th | All the participants will be awarded with the participation Certificate Reflecting their Class/Zonal/State/Olympiad Ranks and Marks. |
Contact Number:
01126166210 + 2 more
Relevant Links:
Official Website Link Click HereFrequently Asked Questions (FAQs)
The results for the Silverzone iOS level 1 exam 2026-27 will be announced in January 2027. Last year, for the academic year 2025-26, the results were declared on January 16, 2026.
The SilverZone foundation will release the IOS answer key 2026-27 within 30 days after the exam.
Students of Class 1 to 12 are eligible to apply for the iOS exam.
Students selected in level 1 iOS exam can appear for level 2 exam.
On Question asked by student community
Dear student,
Silverzone is about to release the answer key for the science olympiad exam. Once available, students can download IOS answer key from the official website: silverzone.org
Silver Zone Olympiad 2025-2026 ( IOS and IOEL) results:
• Expected:January 2026 for level 1.
• Check here: https://www.silverzone.org/results
• Enter enrollment number and details to view marks and rank.
• level 2 results (qualifiers )usually in March/April 2026.
Hello Ayushman,
Here’s the breakdown for your
International Olympiad of Science (IOS)
rewards and eligibility:
Rewards for Level 1 (Ranks 1, 2, 3):
As per latest syllabus. Physics formulas, equations, & laws of class 11 & 12th chapters
As per latest syllabus. Chemistry formulas, equations, & laws of class 11 & 12th chapters
As per latest 2024 syllabus. Study 40% syllabus and score upto 100% marks in JEE
As per latest syllabus. Maths formulas, equations, & theorems of class 11 & 12th chapters