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Chapter 2 – Physical and Chemical Changes

The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:


Time flows, resulting day and night, seasons change, flowering creatures flourish, and the trees and the seasons pass. We see several shifts every day. Change is inevitable. It happens everywhere. However, modifications vary significantly. Some modifications are swift, others sluggish. 

Both normal and man-made changes are either transient or lifelong. When properties of a topic change, a change may be classified either as chemical or physical.

Energy changes are often followed by a specific chemical or physical change. 

Many changes occur in a natural climate, such as water evaporation, condensation, and runoff, to name a few. Both of these improvements are accompanied by a shift of state. The old bonds in the reactants split during certain reactions, and new bonds are formed in the materials.

Physical and chemical changes are the two kinds of changes of matter. A physical change affects a substance’s physical properties, while a chemical change affects its chemical properties, as the 

names suggest. Many physical modifications (like heating and cooling) are reversible, while chemical changes are often permanent or just reversible through another chemical shift.

The form of change in which a material’s physical properties change. Its shape, state of matter, colour, density, scale, odour, and solubility may all be altered. Only the functional properties of the substances are altered during this phase. These modifications have little impact on the chemical structure or internal properties of the substance. Although the atoms are reorganised, the structure stays the same. The outward improvements are easy to notice. 

Dissolving sugar in water, sublimating dry ice, crushing a paper, melting wax, boiling water, melting ice, and so on are several instances of physical changes.

A chemical change is characterised as a change in the molecular structure that results in the creation of a new substance. A new substance is produced as a consequence of chemical modifications. Chemical transitions are inevitable and lasting. It shows that modifying or adjusting the experimental modifications would not undo the chemical change. During a chemical change, the mass of the material changes. The mass is either inserted or deleted. Energy shifts arise as a change in a chemical reaction. The breaking of old bonds in reactants and forming new bonds in products need different amounts of energy. When energy is emitted, the reaction is considered an exothermic reaction; when energy is consumed, it is called an endothermic reaction.

  • Wood or paper burning
  • Camphor burning
  • Milk sourness 
  • Candles burning
  • The process of food digestion
Physical ChangeChemical Change
Despite the fact that a substance’s molecules are rearranged as it undergoes a physical change, the structure stays the same. A substance’s molecular structure is completely altered as it undergoes a chemical change. As a result, chemical transformations result in the creation of new compounds. 
Physical change is a temporal change. A chemical change is a long-term change. 
Only physical attributes, such as form and scale, are affected by a physical change. Chemical transformations change the substance’s physical and chemical characteristics, as well as its structure. 
A physical change requires little or no energy absorption. Absorption and evolution of energy occur during a chemical reaction. 
Freezing water, melting wax, boiling water, and other physical changes are examples of physical change. Food absorption, coal combustion, rusting are chemical change examples. 
Physical changes, in general, do not necessitate the creation of energy. The processing of energy is typically involved in chemical changes (which can be in the form of heat, light, sound, etc.) 
A physical change should not result in the formation of new material. One or more new substances are often produced as a chemical change occurs (s). 
The physical change is reversible, implying the initial material may be restored. Chemical processes are permanent, which means that the initial product cannot be retrieved.

In this chapter, we learned about the basic concepts of physical and chemical changes. We were taught about the Physical And Chemical Changes Classification With Examples. We also learnt about the differences in physical and chemical changes. We can use this knowledge to further enhance the understanding of reactions that take place around us.

  1. What is a chemical transformation?
    A chemical transformation happens where the composition of matter but not its chemical identity. Fouling is an example of a chemical transition. Examples of simmering, heat and freezing.
  2. Give an example of an irreversible change.
    Oxidation of Iron is a chemical process in which rearrangement of atoms and modification of the chemical properties creates a new substance. In the end, it’s an irreversible change.
  3. Melting zinc – is it a chemical change?
    A chemical reaction occurs as one or more substances are converted to other compounds. No product has been produced. If it absorbs heat, the mixture can turn into zinc sulfide (ZnS). 
  4. A chemical change is which process?
    In a chemical change, we get new material, called a chemical synthesis, or an illustration of chemical decomposition. These processes are known as chemical reactions, which are almost often irreversible. 
  5. What’s the importance of a chemical change?
    Chemical processes show matter’s properties. We can figure out its properties by seeing how it reacts with other matter. It is possible to recognise and group unknown species by using these properties. Chemical reactions enable us to perceive matter. We research matter-to-matter experiences to understand a substance’s properties.

MSVgo is your one-stop solution for learning the physical and chemical changes through simple, interactive, and explanatory visualisations. Just try it for yourself once, and we’re sure you’ll be hooked on this interactive mode of learning.

High School Physics

  • Alternating Current
  • Atoms
  • Communication Systems
  • Current Electricity
  • Dual nature of Radiation and Matter
  • Electric Charges and Fields
  • Electricity
  • Electromagnetic Induction
  • Electromagnetic Waves
  • Electron Beams and Radioactivity
  • Electrons and Photons
  • Electrostatic Potential and Capacitance
  • Fluid Pressure
  • Force and Acceleration
  • Force And Laws Of Motion
  • Gravitation
  • Internal Energy
  • Kinetic Theory
  • Law of motion
  • Light – Reflection And Refraction
  • Magnetic Effects Of Electric Current
  • Magnetism and Matter
  • Management Of Natural Resources
  • Mechanical properties of Fluids
  • Mechanical properties of Solids
  • Motion
  • Motion in a plane
  • Motion in a straight line
  • Moving Charges and Magnetism
  • Nuclear Energy
  • Nuclei
  • Oscillations
  • Our Environment
  • Paths of Heat
  • Physical world
  • Ray optics and optical instruments
  • Semiconductor Devices
  • Semiconductor Electronics: Materials, Devices and Simple Circuits
  • Simple Machines
  • Sound
  • Sources Of Energy
  • Specific and Latent Heats
  • Spherical Mirrors
  • Static Electricity
  • Systems of Particles and Rotational motion
  • Thermal properties of matter
  • Thermodynamics
  • Units and Measurement
  • Vectors, Scalar Quantities and Elementary Calculus
  • Wave Optics
  • Waves
  • Work, Power and Energy

High School Chemistry

  • Acids, Bases and Salts
  • Alcohols, Phenols and Ethers
  • Aldehydes, Ketones and Carboxylic Acids
  • Aliphatic and Aromatic Hydrocarbons
  • Alkyl and Aryl Halides
  • Amines
  • Analytical Chemistry 
  • Atomic Structure
  • Atoms And Molecules
  • Basic concepts of Chemistry
  • Biomolecules
  • Carbon And Its Compounds
  • Carboxylic acids and Acid Derivatives
  • Chemical Bonding and Molecular Structures
  • Chemical Energetics
  • Chemical Equilibria
  • Chemical Kinetics
  • Chemical Reactions And Equations
  • Chemical Reactions and Their Mechanisms
  • Chemistry in Everyday Life
  • Chemistry of p-Block elements
  • Chemistry of Transition and Inner Transition
  • Classification of Elements
  • Coordination Compounds
  • Cyanide, Isocyanide, Nitro compounds and Amines
  • Electrochemistry
  • Electrolysis
  • Elements, Compounds and Mixtures
  • Environmental Chemistry
  • Equilibrium
  • Ethers and Carbonyl compounds
  • Haloalkanes and Haloarenes
  • Hydrocarbons
  • Hydrogen
  • Ideal solutions
  • Introduction to Organic Chemistry
  • Ionic equilibria
  • Matter
  • Matter Around Us
  • Matter In Our Surroundings
  • Metallurgy
  • Metals And Non-Metals
  • Mole Concept and Stoichiometry
  • Natural Resources
  • Organic Chemistry – Basic Principles
  • Periodic Classification of Elements
  • Physical and Chemical Changes
  • Physical and Chemical Properties of Water
  • Polymers
  • Preparation, Properties and Uses of Compounds
  • Principles and Processes of Isolation of Elements
  • Redox Reactions
  • Relative Molecular Mass and Mole
  • States of Matter
  • Structure Of The Atom
  • Study of Compounds
  • Study of Gas Laws
  • Study of Representative Elements
  • Surface Chemistry
  • The d-block and f-block elements
  • The Gaseous State
  • The p-Block Elements
  • The Periodic Table
  • The s-Block Elements
  • The Solid State
  • Thermodynamics

High School Biology

  • Absorption and Movement of Water in Plants
  • Adolescent Issues
  • Anatomy of Flowering Plants
  • Animal Kingdom
  • Bacteria and Fungi-Friends and Foe
  • Biodiversity and Conservation
  • Biofertilizers
  • Biological Classification
  • Biomedical Engineering
  • Biomolecules
  • Biotechnology and its Applications
  • Biotic Community
  • Body Fluids and Circulation
  • Breathing and Exchange of Gases
  • Cell – Unit of Life
  • Cell Cycle and Cell Division
  • Cell Division and Structure of Chromosomes
  • Cell Reproduction
  • Cellular Respiration
  • Chemical Coordination and Integration
  • Circulation
  • Control And Coordination
  • Crop Improvement
  • Digestion and Absorption
  • Diversity In Living Organisms
  • Ecosystem
  • Environmental Issues
  • Excretory Products and their Elimination
  • Flowering Plants
  • Genes and Chromosomes
  • Health and Diseases
  • Health and Its Significance
  • Heredity And Evolution
  • Heredity and Variation
  • How Do Organisms Reproduce?
  • Human Diseases
  • Human Eye And Colourful World
  • Human Health and Disease
  • Human Population
  • Human Reproduction
  • Hygiene
  • Improvement In Food Resources
  • Integumentary System- Skin
  • Kingdom Fungi
  • Kingdom Monera
  • Kingdom Protista
  • Life Processes
  • Locomotion and Movement
  • Microbes in Human Welfare
  • Mineral Nutrition
  • Molecular Basis of Inheritance
  • Morphology of Flowering Plants
  • Neural Control And Coordination
  • Nutrition in Human Beings
  • Organism and Population
  • Photosynthesis
  • Photosynthesis in Higher Plants
  • Plant Growth and Development
  • Plant Kingdom
  • Pollination and Fertilization
  • Pollution; Sources and its effects
  • Principles of Inheritance and Variation
  • Reproduction and Development in Angiosperms
  • Reproduction in Organisms
  • Reproductive Health
  • Respiration in Human Beings
  • Respiration in Plants
  • Respiratory System
  • Sexual Reproduction in Flowering Plants
  • Strategies for Enhancement in Food Production
  • Structural Organisation in Animals
  • Structural Organisation of the Cell
  • The Endocrine System
  • The Fundamental Unit Of Life
  • The Living World
  • The Nervous System and Sense Organs
  • Tissues
  • Transpiration
  • Transport in Plants

High School Math

  • Algebra – Arithmatic Progressions
  • Algebra – Complex Numbers and Quadratic Equations
  • Algebra – Linear Inequalities
  • Algebra – Pair of Linear Equations in Two Variables
  • Algebra – Polynomials
  • Algebra – Principle of Mathematical Induction
  • Algebra – Quadratic Equations
  • Binomial Theorem
  • Calculus – Applications of Derivatives
  • Calculus – Applications of the Integrals
  • Calculus – Continuity and Differentiability
  • Calculus – Differential Equations
  • Calculus – Integrals
  • Geometry – Area
  • Geometry – Circles
  • Geometry – Conic Sections
  • Geometry – Constructions
  • Geometry – Introduction to Euclid’s Geometry
  • Geometry – Three-dimensional Geometry
  • Geometry – Lines and Angles
  • Geometry – Quadrilaterals
  • Geometry – Straight Lines
  • Geometry – Triangles
  • Linear Programming
  • Matrices and Determinants
  • Mensuration – Areas
  • Mensuration – Surface Areas and Volumes
  • Number Systems
  • Number Systems – Real Numbers
  • Permutations and Combinations
  • Probability
  • Sequence and Series
  • Sets and Functions
  • Statistics 
  • Trignometry – Height and Distance
  • Trignometry – Identities
  • Trignometry – Introduction

Middle School Science

  • Acids, Bases And Salts
  • Air and Its Constituents
  • Basic Biology
  • Body Movements
  • Carbon and Its Compounds
  • Cell – Structure And Functions
  • Changes Around Us
  • Chemical Effects Of Electric Current
  • Chemistry in Your Life
  • Coal And Petroleum
  • Combustion And Flame
  • Components Of Food
  • Conservation Of Plants And Animals
  • Crop Production And Management
  • Electric Current And Its Effects
  • Electricity And Circuits
  • Elements and Compounds
  • Fibre To Fabric
  • Food production and management
  • Force And Pressure
  • Forests: Our Lifeline
  • Friction
  • Fun With Magnets
  • Garbage In, Garbage Out
  • Getting To Know Plants
  • Health and Hygiene
  • Heat
  • Hydrogen
  • Life Processes: Nutrition in Animals and Plants
  • Light, Shadows And Reflections
  • Materials: Metals And Non-Metals
  • Matter and Its States
  • Metals and Non-metals
  • Micro Organisms: Friend And Foe
  • Motion And Measurement Of Distances
  • Motion And Time
  • Nutrition In Animals
  • Nutrition In Plants
  • Organization in Living Things
  • Our Environment
  • Physical And Chemical Changes
  • Pollution and conservation
  • Pollution Of Air And Water
  • Reaching The Age Of Adolescence
  • Reproduction In Animals
  • Reproduction In Plants
  • Respiration In Organisms
  • Rocks and Minerals
  • Separation Of Substances
  • Simple Machines
  • Soil
  • Some Natural Phenomena
  • Sorting Materials Into Groups
  • Sound
  • Stars And The Solar System
  • Structure of Atom
  • Synthetic Fibers And Plastics
  • The Living Organisms And Their Surroundings
  • Transfer of Heat
  • Transformation of Substances
  • Transportation In Animals And Plants
  • Universe
  • Waste-water Story
  • Water: A Precious Resource
  • Weather, Climate And Adaptations Of Animals To Climate
  • Winds, Storms And Cyclones

Middle School Math

  • Addition
  • Area and Its Boundary
  • Boxes and Sketches
  • Data Handling
  • Fun With Numbers
  • Heavy and Light
  • How Many
  • Long And Short
  • Mapping
  • Measurement
  • Money
  • Multiplication and Factors
  • Multiply and Divide
  • Numbers
  • Parts and Wholes
  • Pattern Recognition
  • Patterns
  • Play With Patterns
  • Rupees And Paise
  • Shapes And Angles
  • Shapes And Designs
  • Shapes and Space
  • Similarity
  • Smart Charts
  • Squares
  • Subtraction
  • Tables And Shares
  • Tenths and Hundredths
  • Time
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