SOF ISO (formerly NSO) Class 10 — Syllabus & Sample Questions
Preparing for the SOF ISO (formerly NSO) in Class 10? This guide covers the Class 10 syllabus scope and two illustrative sample questions with worked explanations, written by Tutors Parliament to help you get started — not official SOF material.
Class 10 ISO Syllabus
Broadly aligned with CBSE, ICSE/ISC and major state board syllabi for Class 10, plus ISO's logical-reasoning and application-based questions.
- Chemical Reactions & Equations
- Acids, Bases & Salts, Metals & Non-metals
- Carbon & Its Compounds
- Life Processes, Control & Coordination
- Heredity
- Light — Reflection & Refraction
- Electricity & Magnetic Effects
Sample Questions
Two illustrative practice questions written by Tutors Parliament for Class 10 ISO — not official SOF questions. Tap a question to reveal the answer and explanation.
Question 1
Which type of lens is used to correct myopia (short-sightedness)?
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Question 1
Which type of lens is used to correct myopia (short-sightedness)?
- A. Convex lens
- B. Concave lens ✓
- C. Bifocal lens
- D. Cylindrical lens
Question 2
Which gas is released when a metal reacts with a dilute acid?
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Question 2
Which gas is released when a metal reacts with a dilute acid?
- A. Oxygen
- B. Carbon dioxide
- C. Hydrogen ✓
- D. Nitrogen
Preparation Strategy for Class 10
- Revise Physics, Chemistry and Biology chapters evenly rather than favouring one strand
- Practice numerical problems in Physics and Chemistry under time pressure
- Connect Biology topics to diagrams and functional relationships, not just definitions
- Revisit the previous class's topics for revision, since Olympiad papers often draw on cumulative knowledge
Frequently Asked Questions
What topics are covered in ISO for Class 10?
Class 10 ISO broadly follows that class's school syllabus for the subject, with added logical-reasoning and application-based questions. See the syllabus list on this page for the specific topics it covers.
Are the sample questions on this page official SOF questions?
No. These are original practice questions written by Tutors Parliament to illustrate the style and difficulty level of Class 10 ISO, not official SOF material. Refer to SOF's own sample papers for official practice content.
How can Tutors Parliament help with Class 10 ISO preparation?
A tutor can identify which topics from the Class 10 syllabus need the most attention and build focused practice around them, rather than generic revision.
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