The National Science Olympiad (NSO) is a yearly competitive exam conducted for school students. Organized by the Science Olympiad Foundation (SOF), this exam aims at cultivating scientific reasoning and logical ability among the students through a rigorous test.

The Science Olympiad Foundation primarily instills scientific curiosity and vigour in young students through competitive exams.

Eligibility Criteria:
Any student from class 1 to class 12 of boards CBSE / SSC / ICSE can appear for the exam.

Selection Process:
There are two levels:
Level 1: Any one can appear from the school.
Level 2: The top 5% of students (class-wise) who appear for the first level exam. The top 25 rank holders state-wise. Class toppers from each participating school; where at least 10 students participate and score a minimum of 50%.

Exam Pattern

Classes 1 to 4
Particulars
Details
Subjects
Science, Mathematics and Logical Reasoning
Type of questions
Objective (MCQs)
Mode of examination
Written Test
Exam duration
1 hour
Number of questions
35 questions
Languages
English
Marking scheme
1 mark awarded for each correct answer
(Science and Logical Reasoning)

2 marks awarded for each correct answer
(Achievers Section)
Negative marking
No negative marking

Classes 5 to 10
Particulars
Details
Subjects
Science, Mathematics and Logical Reasoning
Type of questions
Objective (MCQs)
Mode of examination
Written Test
Exam duration
1 hour
Number of questions
50 questions
Languages
English
Marking scheme
1 mark awarded for each correct answer
(Science and Logical Reasoning)

3 marks awarded for each correct answer
(Achievers Section)
Negative marking
No negative marking

Classes 11 and 12
Particulars
Details
Subjects
Physics, Chemistry and Maths/Biology
Type of questions
Objective (MCQs)
Mode of examination
Written Test
Exam duration
1 hour
Number of questions
50 questions
Languages
English
Marking scheme
1 mark awarded for each correct answer
(Physics, Chemistry, Maths and Biology)

3 marks awarded for each correct answer
(Achievers Section)
Negative marking
No negative marking

Here is the marking scheme for the first level examination:

Subject
No. of Questions
Total Marks
Classes 1 to 4
Logical Reasoning 5 (1 mark per
question)
5
Science 25 (1 mark per question) 25
Achievers Section 5 (2 marks per question) 10
Grand Total 35 40
Classes 5 to 10
Logical Reasoning 10 (1 mark per
question)
10
Science 35 (1 mark per
question)
35
Achievers section 5 (3 marks per
question)
15
Grand Total 50 60
Classes 11 to 12
Physics and Chemistry 25 (1 mark per
question)
25
Achievers section 5 (3 marks per
question)
15
Mathematics or Biology 20 (1 mark per
question)
20
Grand Total 50 60

Here is the marking scheme for the second level examination:

Subject
No. of Questions
Total Marks
Classes 3 to 4
Science 30 (1 mark per question) 30
Achievers section 5 (2 marks per question) 10
Grand Total 35 40
Classes 5 to 10
Science 45 (1 mark per question) 45
Achievers section 5 (3 marks per question) 15
Grand Total 50 60
Classes 11 to 12
Physics and Chemistry 25 (1 mark per question) 25
Achievers section 5 (3 marks per
question)
15
Mathematics or Biology 20 (1 mark per
question)
20
Grand Total 50 60
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