Matter in Our Surroundings Class 9 MCQs are one of the most effective ways to revise Chapter 1 of CBSE Board Class 9 Science. This chapter builds the base of Chemistry concepts and explains how matter behaves in different conditions. Students often study the theory from NCERT but struggle while solving objective questions in exams. That is why practicing Matter in Our Surroundings Class 9 MCQs regularly becomes important.
These MCQs are prepared according to the latest CBSE and NCERT syllabus and cover all major concepts from the chapter including states of matter, diffusion, evaporation, sublimation, and change of state. Solving Matter in Our Surroundings Class 9 MCQs also helps students improve conceptual clarity, accuracy, and question-solving speed before school exams.
Many questions in school tests now focus more on concepts rather than direct definitions. So, simply reading notes is not enough sometimes. Practicing MCQs on Matter in Our Surroundings helps students understand how concepts are actually asked in examinations. These questions are useful for revision, periodic tests, annual exams, Olympiads, and general Science practice as well.
Students preparing for exams should attempt these Matter in Our Surroundings Class 9 MCQs multiple times to identify weak areas and strengthen their preparation gradually.
Topics Covered in Matter in Our Surroundings MCQs
These Matter in Our Surroundings Class 9 MCQs cover all important concepts from Chapter 1 of Class 9 Science.
- Physical nature of matter
- Characteristics of particles of matter
- States of matter
- Properties of solids, liquids, and gases
- Diffusion
- Change of state
- Effect of temperature on matter
- Effect of pressure on matter
- Evaporation
- Factors affecting evaporation
- Sublimation
- Melting point and boiling point
- Intermolecular force
- Kinetic energy of particles
The questions are designed in a way that students can revise the complete chapter while practicing objective questions. Some questions are direct NCERT-based while others test conceptual understanding a bit deeper.
Matter in Our Surroundings Class 9 Chapter 1 MCQs with Answers
Q.Which of the following statements is true about matter?
A.Matter has mass but does not occupy space.
B.Matter has mass but does not occupy space.
C.Matter occupies space but does not have mass.
D.Matter neither has mass nor occupies space.
Answer: B
Explanation: The definition of matter includes both having mass and occupying space (volume). All physical substances around us are examples of matter.
Q.Which of the following is NOT considered matter?
A.Sand
B.Light
C.Water
D.Air
Answer: C
Explanation: Sand, water, and air all have mass and occupy space, making them matter. Light is a form of energy (electromagnetic radiation) and does not fit the definition of matter.
Q.What is the physical state of water at 25°C?
A.Solid
B.Liquid
C.Gas
D.Plasma
Answer: B
Explanation: Water freezes at 0°C and boils at 100°C at standard atmospheric pressure. Therefore, at 25°C, it is in its liquid state.
Q.Which state of matter has a definite shape and a definite volume?
A.Solid
B.Liquid
C.Gas
D.Plasma
Answer: A
Explanation: Solids are characterized by strong intermolecular forces that hold their particles in rigid positions, giving them a definite shape and volume. Liquids have a definite volume but take the shape of their container, while gases have neither a definite shape nor a definite volume.
Q.Which state of matter has no definite shape and no definite volume?
A.Solid
B.Liquid
C.Gas
D.Both Liquid and Gas
Answer: C
Explanation: Gases are highly compressible and their particles are far apart and move randomly, leading to no definite shape or volume. They completely fill any container they are placed in.
Q.The phenomenon of change of a liquid into vapor at any temperature below its boiling point is called:
A.Boiling
B.Melting
C.Evaporation
D.Condensation
Answer: C
Explanation: Evaporation is a surface phenomenon where molecules with sufficient kinetic energy escape from the liquid phase into the gaseous phase. Boiling, on the other hand, occurs at a specific temperature (boiling point) throughout the bulk of the liquid.
Q.Which of the following factors does NOT affect the rate of evaporation?
A.Surface area
B.Temperature
C.Humidity
D.Atmospheric pressure
Answer: D
Explanation: Increased surface area, higher temperature, and lower humidity all increase the rate of evaporation. Wind speed also increases evaporation. Atmospheric pressure primarily affects the boiling point, not the rate of evaporation below that point.
Q.The process by which a solid directly changes into a gas without passing through the liquid state is called:
A.Melting
B.Freezing
C.Sublimation
D.Condensation
Answer: C
Explanation: Sublimation is a unique phase transition where a substance bypasses the liquid state. The reverse process, where a gas directly changes into a solid, is called deposition or desublimation.
Q.Which of the following substances undergoes sublimation?
A.Water
B.Iron
C.Naphthalene
D.Sugar
Answer: C
Explanation: Naphthalene, dry ice (solid carbon dioxide), and camphor are common examples of substances that exhibit sublimation at room temperature and pressure. Water melts and boils, iron melts at very high temperatures, and sugar melts and decomposes.
Q.The amount of heat energy required to change 1 kg of a solid into liquid at its melting point without any change in temperature is known as:
A.Latent heat of fusion
B.Latent heat of vaporization
C.Specific heat capacity
D.Heat capacity
Answer: A
Explanation: Latent heat of fusion is the hidden heat energy used to change the state of matter from solid to liquid at its melting point without increasing the temperature. This energy breaks the bonds between particles in the solid state.
Q.The amount of heat energy required to change 1 kg of a liquid into vapor at its boiling point without any change in temperature is known as:
A.Latent heat of fusion
B.Latent heat of vaporization
C.Specific heat capacity
D.Heat capacity
Answer: B
Explanation: Latent heat of vaporization is the hidden heat energy required to convert a unit mass of a liquid into a gas at its boiling point without a change in temperature. This energy is used to separate the liquid molecules completely.
Q.Why does a desert cooler cool better on a hot dry day?
A.Because the air is drier, increasing the rate of evaporation.
B.Because the temperature is higher, decreasing the rate of evaporation.
C.Because the humidity is high, increasing the rate of evaporation.
D.Because there is less wind, decreasing the rate of evaporation.
Answer: A
Explanation: Evaporation causes cooling because the liquid absorbs latent heat of vaporization from the surroundings to change into vapor. A hot dry day means high temperature and low humidity, both of which favor a higher rate of evaporation, leading to more effective cooling.
Q.What is the SI unit of temperature?
A.Celsius (°C)
B.Fahrenheit (°F)
C.Kelvin (K)
D.Joule (J)
Answer: C
Explanation: Kelvin is the absolute temperature scale where 0 K represents absolute zero, the lowest possible temperature. While Celsius is widely used, Kelvin is the standard unit in scientific contexts, particularly in physics and chemistry.
Q.Convert 25°C to Kelvin.
A.298 K
B.273 K
C.25 K
D.248 K
Answer: A
Explanation: The formula for converting Celsius to Kelvin is K = °C + 273.15. Therefore, 25°C + 273 = 298 K.
Q.What is the boiling point of water in Kelvin?
A.100 K
B.273 K
C.373 K
D.0 K
Answer: C
Explanation: Standard boiling point of water is 100°C. Using the conversion K = °C + 273, we get 100 + 273 = 373 K.
Q.The particles of matter are continuously moving, meaning they possess:
A.Potential energy
B.Chemical energy
C.Kinetic energy
D.Thermal energy
Answer: C
Explanation: The constant motion of particles in matter is a fundamental characteristic, and this motion is directly associated with kinetic energy. The higher the temperature, the more kinetic energy the particles have, leading to faster movement.
Q.Which of the following has the highest kinetic energy at a given temperature?
A.Particles of solid
B.Particles of liquid
C.Particles of gas
D.All have the same kinetic energy
Answer: C
Explanation: At a given temperature, particles of gas move much more freely and randomly compared to liquids and solids. This freedom of movement translates to higher kinetic energy. Solids have the least kinetic energy, followed by liquids.
Q.What happens to the kinetic energy of particles as the temperature increases?
A.It decreases
B.It increases
C.It remains the same
D.It first decreases then increases
Answer: B
Explanation: Temperature is a measure of the average kinetic energy of the particles in a substance. Therefore, an increase in temperature directly corresponds to an increase in the kinetic energy of the constituent particles.
Q.The intermolecular forces are strongest in which state of matter?
A.Solid
B.Liquid
C.Gas
D.Plasma
Answer: A
Explanation: The strength of intermolecular forces determines the state of matter. Solids have the strongest forces, holding particles in fixed positions. Liquids have weaker forces, allowing particles to slide past each other. Gases have very weak forces, allowing particles to move freely.
Q.The intermolecular spaces are maximum in which state of matter?
A.Solid
B.Liquid
C.Gas
D.Plasma
Answer: C
Explanation: Due to very weak intermolecular forces, gas particles are widely separated from each other, resulting in large intermolecular spaces. This characteristic makes gases highly compressible.
Q.Which of the following is the correct order of increasing forces of attraction between particles?
A.Water, Sugar, Oxygen
B.Oxygen, Water, Sugar
C.Sugar, Water, Oxygen
D.Oxygen, Sugar, Water
Answer: B
Explanation: The forces of attraction between particles are weakest in gases, intermediate in liquids, and strongest in solids. Oxygen is a gas, water is a liquid, and sugar is a solid. Therefore, the order of increasing forces of attraction is Oxygen (gas) < Water (liquid) < Sugar (solid).
Q.What is diffusion?
A.The process of mixing of different substances due to the motion of their particles.
B.The process of a substance changing from solid to liquid.
C.The process of a substance changing from liquid to gas.
D.The process of a substance changing from gas to liquid.
Answer: A
Explanation: Diffusion is a key characteristic of matter, especially prominent in gases and liquids, where particles move randomly and spread out to fill the available space or mix with other substances. This process is driven by the kinetic energy of particles.
Q.Which state of matter shows the fastest rate of diffusion?
A.Solid
B.Liquid
C.Gas
D.Plasma
Answer: C
Explanation: The rate of diffusion is directly related to the kinetic energy of particles and the intermolecular spaces. Gases have the highest kinetic energy and largest spaces, hence they diffuse fastest. Solids diffuse extremely slowly, if at all.
Q.What is the effect of increasing temperature on the rate of diffusion?
A.It decreases the rate of diffusion.
B.It increases the rate of diffusion.
C.It has no effect on the rate of diffusion.
D.It first decreases then increases the rate of diffusion.
Answer: B
Explanation: Higher temperature means particles have more kinetic energy. This increased energy leads to faster and more vigorous movement of particles, resulting in a quicker rate of intermixing and spreading, i.e., diffusion.
Q.Which of the following is an example of diffusion in daily life?
A.Melting of ice
B.Spreading of perfume in a room
C.Boiling of water
D.Freezing of water
Answer: B
Explanation: When perfume is sprayed, its volatile particles mix with air particles and spread out from a region of high concentration (near the spray) to a region of low concentration (the rest of the room). This is a direct observation of diffusion.
Q.Which of the following is true about plasma?
A.It is a state of matter consisting of neutral atoms.
B.It is a super-cooled liquid.
C.It is a state of matter consisting of super energetic and super excited particles in the form of ionized gases.
D.It is a state of matter found only in laboratories.
Answer: C
Explanation: Plasma is formed at very high temperatures where atoms lose their electrons, becoming a mixture of free electrons and ions. This super energetic state is found naturally in stars, lightning, and artificially in neon signs and fluorescent tubes.
Q.Where is plasma found naturally?
A.In glaciers
B.In the Earth's core
C.In stars and the sun
D.In oceans
Answer: C
Explanation: The extreme temperatures in stars and the sun cause gases to ionize, forming plasma. This is the most common state of matter in the universe by mass.
Q.What is the full form of BEC?
A.Bose-Einstein Condensate
B.Basic Element Compound
C.Boiling-Evaporation Cycle
D.Binary Energy Conversion
Answer: A
Explanation: Bose-Einstein Condensate (BEC) is a state of matter formed when a gas of bosons is cooled to temperatures very close to absolute zero. At this temperature, a large fraction of the bosons occupy the lowest quantum state, becoming a single quantum mechanical entity.
Q.Bose-Einstein Condensate (BEC) is formed by cooling a gas of extremely low density to:
A.High temperatures
B.Room temperature
C.Very low temperatures, close to absolute zero
D.Temperatures above boiling point
Answer: C
Explanation: At these extremely low temperatures, the particles lose almost all their kinetic energy and begin to condense into a single quantum state, forming the BEC. This is a quantum phenomenon.
Q.Which of the following processes releases heat energy to the surroundings?
A.Melting
B.Boiling
C.Condensation
D.Evaporation
Answer: C
Explanation: Melting, boiling, and evaporation are endothermic processes, meaning they absorb heat from the surroundings. Condensation (gas to liquid) and freezing (liquid to solid) are exothermic processes, meaning they release heat to the surroundings.
Exam Tips to Solve Matter in Our Surroundings MCQs
Students often lose marks in objective questions because of small confusion between concepts. These simple tips can help while solving Matter in Our Surroundings Class 9 MCQs.
- In Matter in Our Surroundings Class 9 MCQs, students should carefully read terms like evaporation, diffusion, and latent heat before choosing the correct option.
- Do not confuse boiling with evaporation. Both are different processes.
- Revise properties of solids, liquids, and gases properly.
- Focus on NCERT definitions and examples first.
- Eliminate clearly incorrect options before choosing the final answer.
- Questions based on diffusion and kinetic energy are commonly asked in exams.
- Revise factors affecting evaporation carefully because students usually mix them up.
- Practice conceptual questions regularly instead of only direct factual questions.
Sometimes students know the answer but still select the wrong option in hurry. Slow reading helps more than random guessing.
Why Practice Matter in Our Surroundings Class 9 MCQs?
Practicing Matter in Our Surroundings Class 9 MCQs helps students in many ways during exam preparation. Since objective questions are now common in school examinations, regular MCQ practice becomes important for scoring better marks.
- Helps in quick revision before exams
- Improves conceptual understanding of the chapter
- Makes students familiar with objective question patterns
- Useful for school tests and competency-based questions
- Improves accuracy and solving speed
- Helps students identify confusing concepts easily
- Strengthens basic Chemistry fundamentals
- Supports NCERT-based preparation effectively
A lot of students read the chapter properly but still make mistakes in MCQs because they miss small conceptual differences. Regular practice helps reduce those errors slowly.
Importance of MCQs in Class 9 Science Exam Preparation
MCQs are becoming an important part of Class 9 Science examinations. Schools are now focusing more on conceptual learning instead of only theory writing. Because of this, students should practice Matter in Our Surroundings Class 9 MCQs alongside reading NCERT solutions and notes.
Objective questions test whether students actually understand concepts like diffusion, evaporation, or change of state instead of just memorising definitions. Some questions may look simple but are actually designed to check deep understanding.
Practicing MCQs regularly also improves confidence during exams. Students learn how to manage tricky options, eliminate incorrect answers, and solve questions faster. Even for final revision, Matter in Our Surroundings Class 9 MCQs are much more effective than reading long answers repeatedly.
Conclusion
Practicing Matter in Our Surroundings Class 9 MCQs regularly can help students improve conceptual understanding and perform better in exams. These objective questions cover important topics from Chapter 1 and support quick revision before school tests and assessments. Along with NCERT study and regular practice, solving MCQs helps students build accuracy, confidence, and a stronger understanding of basic Science concepts.