Matter in Our Surroundings — Class 9 MCQs with Answers
Class 9 CBSE Science · Chapter 101
Pre-2026 syllabusThis chapter is from the older NCERT book. See the 2026-27 Class 9 Science chapters →
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Jump to the 6 solved questions
Practise the most important Class 9 CBSE Science questions from Chapter 101, "Matter in Our Surroundings". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that top scorers in CBSE Board exams and the JEE & NEET foundation years get right.
To score well in "Matter in Our Surroundings", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This helps you stay accurate when time is short, just as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Matter in Our Surroundings, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 9 Science mastery score. Try the 6 sample questions below: tap an option to see the answer and a worked explanation. Sign in free to start practising.
Matter in Our Surroundings — important questions & MCQs with answers (Class 9 Science)
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.
0 of 6 answered
- Q1 of 6Easy
Which state of matter has neither a fixed shape nor a fixed volume?
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Answer: Gas
Explanation: Gas particles have weak intermolecular forces and move freely, so they spread to fill any container completely — giving gases neither a fixed shape nor a fixed volume, unlike liquids, which keep a fixed volume.
- Q2 of 6Easy
The temperature at which a solid melts to become a liquid at atmospheric pressure is called its:
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Answer: Melting point
Explanation: Melting point is the fixed temperature at which a solid turns to liquid at 1 atm pressure; boiling point is the liquid-to-gas transition temperature, a different process entirely.
- Q3 of 6Medium
Brownian motion provides evidence for which property of matter?
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Answer: Particles of matter are in continuous random motion
Explanation: The random zig-zag path of suspended particles arises because surrounding fluid molecules are themselves in continuous random motion and strike the particle unevenly — direct evidence of that ceaseless molecular motion.
- Q4 of 6Medium
Why does sweating cool the human body?
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Answer: Evaporation of sweat absorbs latent heat from the body surface
Explanation: Evaporation is endothermic: sweat on the skin absorbs latent heat directly from the body as it turns to vapour, lowering skin temperature — sweat does not cool by being cold itself.
- Q5 of 6Hard
The sun and other stars consist mainly of plasma. Plasma is best described as:
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Answer: A state of matter consisting of ionised gas with free electrons and positive ions
Explanation: At extremely high temperatures, gas atoms lose electrons, leaving a mix of free electrons and positive ions — this ionised gas is plasma, the state that makes up the sun and most stars.
- Q6 of 6Hard
Which of the following does NOT undergo sublimation?
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Answer: Common salt (NaCl)
Explanation: Common salt is an ionic solid held together by strong electrostatic forces, giving it a very high melting point, so it does not sublime under ordinary conditions — unlike camphor, iodine and ammonium chloride.
Matter in Our Surroundings notes: key concepts (Class 9 Science)
This chapter explains that matter is made of tiny particles, how their arrangement gives the three states of matter, and how temperature and pressure cause changes of state.
- Particle nature of matter
- Matter is made of very small particles that have space between them, are continuously moving, and attract one another.
- States of matter
- Solids have fixed shape and volume; liquids have fixed volume but take the container's shape; gases have neither, filling any container.
- Change of state
- Heating overcomes inter-particle forces: melting (solid→liquid) and boiling (liquid→gas); cooling reverses them. Temperature stays constant during a change of state.
- Latent heat
- The hidden heat absorbed or released during a change of state without a change in temperature (latent heat of fusion and of vaporisation).
- Evaporation
- Surface liquid turning to vapour below the boiling point; it causes cooling and increases with temperature, surface area, wind and lower humidity.
- Sublimation
- A solid changing directly to gas (e.g. camphor, dry ice) without becoming a liquid.
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Matter in Our Surroundings — FAQs
What are the key concepts in Class 9 Science Matter in Our Surroundings?+
This chapter explains that matter is made of tiny particles, how their arrangement gives the three states of matter, and how temperature and pressure cause changes of state. Key ideas include Particle nature of matter, States of matter, Change of state, Latent heat, Evaporation, Sublimation.
What does Class 9 Science Chapter 101 (Matter in Our Surroundings) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "Matter in Our Surroundings": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams and the JEE & NEET foundation years.
Are these "Matter in Our Surroundings" questions free to practise?+
Yes. Sign in with Google to practise "Matter in Our Surroundings" free. Full unlimited access is ₹999/year. One year from the day you pay. You stay in Class 9 till 31 March; on 1 April your account moves up to Class 10 and the rest of your year carries over. No chapter is charged separately.
How should I revise "Matter in Our Surroundings" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Matter in Our Surroundings" MCQs available with answers?+
Yes. 6 sample questions are on this page with answers: tap an option, or "Show answer", to see the correct option and a step-by-step explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Matter in Our Surroundings" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Matter in Our Surroundings (Class 9 Science)?+
The questions that matter most test Particle nature of matter, States of matter, Change of state, Latent heat, Evaporation, Sublimation. This page shows 6 solved important MCQs with answers and explanations. Sign in to practise all 90 questions on the chapter as timed quizzes.
Is there an online quiz for Matter in Our Surroundings?+
Yes — Class 9 Science Matter in Our Surroundings has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.
Are there question answers and extra questions for Matter in Our Surroundings (Class 9 Science)?+
Yes. This page has 6 solved questions on Matter in Our Surroundings, each with the correct answer and a short explanation. Sign in to practise all 90 questions on the chapter as timed quizzes.