Topics
Matter in Our Surroundings
- Matter
- Characteristics of Particles (Molecules) of Matter
- The Solid State
- The Liquid State
- The Gaseous State
- Plasma
- Bose-einstein Condensate
- Change of State of Matter
- Concept of Melting (Fusion)
- Concept of Boiling (Vaporization)
- Concept of Sublimation
- Concept of Freezing (Solidification)
- Concept of Condensation (Liquefaction)
- Concept of Desublimation (Deposition)
- Concept of Evaporation
Is Matter Around Us Pure
- Matter
- Mixture
- Solutions
- Concentration of a Solution
- Concept of Suspension
- Colloidal Solution
- Evaporation Method
- Centrifugation Method
- Solvent Extraction (Using a Separating Funnel Method)
- Sublimation Method
- Chromatography Method
- Distillation Method
- Fractional Distillation Method
- Crystallisation Method
- Classification of Change: Physical Changes
- Pure Substances
- Elements
- Compound
Atoms and Molecules
- Difference Between Atoms and Molecules
- Law of Conservation of Mass
- Law of Constant Proportions
- Atom
- The Modern Day Symbols of Atoms of Different Elements
- Mass Number (A) or Atomic Mass
- Molecules
- Molecules of Elements
- Molecules of Compounds
- Concept of an Ion
- Writing Chemical Formulae
- Concept of Molecular Mass
- Concept of Molecular Mass
- Mole Concept
- Atoms and Molecules Numericals
Structure of the Atom
- Atom
- Sub-atomic Particles of Atom
- Structure of an Atom
- J. J. Thomson’s Atomic model
- Lord Rutherford’s Atomic model
- Neil Bohr’s Model of Atom
- Concept of Proton
- Neutrons (N)
- Concept of Electron
- Concept of Electrons Distributed in Different Orbits (Shells)
- Valency and Its Types
- Atomic Number (Z)
- Mass Number (A) or Atomic Mass
- Isotopes
- Isobars
- Atoms and Molecules Numericals
The Fundamental Unit of Life
- The Invention of the Microscope and the Discovery of Cell
- Prokaryotic and Eukaryotic Cell
- Osmosis and Osmotic Pressure
- Structure of a Cell
- Plasma Membrane
- Cell Wall - “Supporter and Protector”
- Nucleus - “Brain” of the Cell
- Cytoplasm - “Area of Movement”
- Endoplasmic Reticulum (ER)
- Golgi Apparatus
- Lysosome - “Suicidal Bag”
- Mitochondria - “Power House of the Cell”
- Plastids
- Non-living Substances Or Cell Inclusions
- Difference Between Plant Cell and Animal Cell
- Cell Inclusion
Tissues
Diversity in Living Organisms
Motion
- Motion and Rest
- Distance and Displacement
- Motion and Rest
- Motion Along a Straight Line
- Types of Motion Based on Speed
- Measuring the Rate of Motion - Speed with Direction
- Rate of Change of Velocity
- Distance - Time Graphs
- Distance - Time Graphs
- Velocity - Time Graphs
- Equations of Motion by Graphical Method
- Derivation of Velocity - Time Relation by Graphical Method
- Derivation of Position - Time Relation by Graphical Method
- Derivation of Position - Velocity Relation by Graphical Method
- Types of Motion Based on Speed
- Motion (Numerical)
Force and Laws of Motion
- Force
- Force - Push or Pull
- Force - Push or Pull
- Force - Push or Pull
- Effect of Force
- Effect of Force
- Types of Force: Contact Force
- Types of Force: Non-Contact Force
- Balanced and Unbalanced Forces
- Newton's First Law of Motion
- Inertia and Mass
- Newton's Second Law of Motion
- Newton's Third Law of Motion
- Conservation of Momentum
- Force and Laws of Motion (Numerical)
Gravitation
- Concept of Gravitation
- Newton’s Universal Law of Gravitation
- Free Fall
- To Calculate the Value of G
- Motion of Objects Under the Influence of Gravitational Force of the Earth
- Concept of Mass
- Concept of Weight
- Trust and Pressure
- Buoyancy Force (Upthrust Force)
- Pressure Exerted by Liquids and Gases
- Density of the Fluid
- Archimedes' Principle
- Relative Density
Work and Energy
- Definition of Work
- Work Done by a Constant Force
- Concept of Energy
- Different Forms of Energy
- Types of Mechanical Energy: Kinetic Energy
- Types of Mechanical Energy: Potential Energy
- The Potential Energy of an Object at a Height
- Work Done by a Energy
- Work Done by a Power
- Conversion of One Form of Energy into the Other Form
- Law of Conservation of Energy
- Rate of Doing Work
- Concept of Energy
- Work and Energy (Numericals)
Sound
Why Do We Fall ill
- Health and Its Failure
- The Significance of ‘Health'
- Personal and Community Issues Both Matter for Health
- Distinctions Between ‘Healthy’ and ‘Disease-free’
- Identification of Disease
- Categories of Diseases
- Chronic Diseases and Poor Health
- Causes of Disease
- Infectious and Non-infectious Causes
- Categories of Diseases
- Infectious Agents
- Airborne Diseases Caused by Bacteria
- Diseases Caused by Parasitic Worms
- Diseases Caused by Protozoa
- Modes of Transmission of Diseases (Air, Water, Food, Insects)
- Organ-specific and Tissue-specific Manifestations of Disease
- Principles of Prevention of Diseases
- Principles of Treatment of Diseases
Our Environment
- The Environment
- The Breath of Life - Air
- The Role of the Atmosphere in Climate Control
- Movements of Air (Winds) and Its Role in Bringing Rains Across India
- Water - A Wonder Liquid
- Water Pollution
- Mineral Riches in the Soil
- Biogeochemical Cycle
- The Water-cycle
- The Nitrogen-cycle
- The Carbon Cycle
- The Oxygen-cycle
- Ozone Layer Depletion
Improvement in Food Resources
definition
- Mixture: Mixtures are formed when two or more substances mixed together without participating in a chemical change.
- Homogeneous Mixtures: A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. Example: salt in water.
- Heterogeneous Mixture: A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. Eg. Vegetable soup.
notes
Mixture:
- Mixtures are formed when two or more substances mixed together without participating in a chemical change.
- In simple words, a mixture is a material made up of two or more different substances which are physically combined.
Examples of Mixtures:
- Oil and water
- Potassium nitrate, sulfur, and carbon (Gunpowder)
- Minerals, organic materials, air, water, and living organisms (Soil)
General Properties of Mixtures:
- A mixture is a combination of two or more substances that are not chemically combined.
- No chemical change happens when a mixture is made. So, each substance has the same chemical makeup it has before the mixture was formed.
- A mixture is a physical change.
- Each substance in a mixture keeps its identity.
- The substances in a mixture can be separated using physical methods such as filtration, freezing, and distillation.
Types of mixture:
1) Homogeneous Mixtures:
- Homo means same
- A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.
- Example: salt in water.
- It has a uniform composition and it can’t be separated out physically.
2) Heterogeneous Mixture:
- Hetero means different
- A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. Eg. Vegetable soup.
- It has a non-uniform composition and it can be separated out physically.
Then is air homogeneous or heterogeneous?
It is homogeneous because as its constituents quickly mix in with the other constituents to become uniform (clearly, we do not see different layers of its components)
Example
List the points of differences between homogeneous and heterogeneous mixtures with examples.
Sr. No. | Homogeneous mixture | Heterogeneous mixture |
1 | All the components of the mixture are uniformly mixed. | All the components of the mixture are not thoroughly mixed. |
2 | No separation boundaries are visible. | Separation boundaries are visible. |
3 | It consists of a single phase. | It consists of two or more phases. |
4 | Example: Sugar dissolved in water | Example: Air, sand, and common salt. |
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