Topics
Air : a Mixture of Gases
- Occurrence of Nitrogen
- Properties of Nitrogen
- Importance of Nitrogen
- Importance of Carbon Dioxide
- Composition and Components of Air
- Water Cycle
- Air Quality
- Air Pollution and Its Causes
- Effects of Air Pollution
- Prevention of Air Pollution
Matter and Its Composition
Oxygen
- Discovery of Oxygen
- Occurrence of Oxygen
- Laboratory Preparation of Oxygen
- Properties of Oxygen
- Rusting
- Burning and Combustion
- Tests for Oxygen
- Importance of Oxygen
- The Oxygen Cycle
Physical and Chemical Changes
- Changes-Physical and Chemical
- Classification of Change: Slow and Fast Changes
- Classification of Change: Natural and Man-made Changes
- Classification of Change: Periodic and Non-periodic Changes
- Classification of Change: Desirable and Undesirable Changes
- Classification of Change: Reversible and Irreversible Changes
- Classification of Change: Physical Changes
- Heat and change of physical state
- Concept of Melting (Fusion)
- Concept of Boiling (Vaporization)
- Concept of Freezing (Solidification)
- Concept of Condensation (Liquefaction)
- Concept of Evaporation
- Chemical Reaction
- Indicators of a Chemical Change (Chemical Reaction)
Elements, Compounds and Mixtures (Experimental Techniques)
- Matter (Substance)
- Natural substances
- Pure Substances
- Impure Substance
- Elements
- Types of Element: Metals
- Types of Element: Non-metal
- Type of Element: Metalloid
- Type of Elements: Noble Or Inert Gases
- Symbols Used to Represent Atoms of Different Elements
- Compound
- Mixture
- Types of Mixtures
- Differences Between Elements, Compounds, and Mixtures
- Formation of Mixtures
- Separation of Mixtures
- Methods of Separation
- Handpicking Method
- Winnowing Method
- Magnetic Separation Method
- Gravitation Method
- Sublimation Method
- Solvent Extraction (Using a Separating Funnel Method)
- Sedimentation Method
- Decantation Method
- Filtration Method
- Evaporation Method
- Crystallisation Method
- Simple Distillation Method
- Centrifugation Method
- Fractional Distillation Method
- Chromatography Method
- Separation of Constituents of the Mixtures with More than Two Constituent
Atomic Structure
- Atoms: Building Blocks of Matter
- Dalton’s Atomic Theory
- Molecules
- Classification of Molecules
- Classification of Molecules
- Molecular Formula of an Elements
- Classification of Molecules
- Ions (Radicals) and Its Types
- Difference Between Atom, Molecules, and Radicals
- Valency
- Variable Valency
- The Modern Periodic Table
- Molecular Formula of Compounds
- Chemical Formula or Molecular Formula
- Naming Chemical Compounds
Language of Chemistry
- Chemical Reaction
- Conditions Necessary for Chemical Reactions
- Chemical Reaction
- Indicators of a Chemical Change (Chemical Reaction)
- Chemical Equation
- Balancing Chemical Equation
Metals and Non-metals
Air and Atmosphere
Air Around Us:
Air is the invisible mixture of gases that surrounds the Earth and fills the atmosphere. Even though we cannot see air, it plays a crucial role in supporting life. Air is all around us, from the ground we walk on to the sky above, and it’s something we use every time we breathe.
Air is made up of different gases, such as nitrogen, oxygen, and carbon dioxide, and small amounts of other gases, such as argon and helium. Along with gases, air also contains water vapour and tiny dust particles. These gases and particles are essential for various processes, such as breathing, plant growth, and even weather changes.
If you would like to contribute notes or other learning material, please submit them using the button below.
Related QuestionsVIEW ALL [121]
With whom should I pair up?
| Group A | Group B | ||
| 1 | Air | a | Excretion |
| 2 | Water | b | Scattering of light |
| 3 | Soil | c | Plasticity |
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
