Mixtures
A mixture is a substance which consists of two or more elements or compounds not chemically combined together. For example, air is a mixture of gases like oxygen, nitrogen, argon, carbon dioxide and water vapour, etc. The various gases of the air are not chemically combined with one another. Similarly,gunpowder is a mixture of potassium nitrate, sulphur and charcoal (charcoal is a form of carbon), whereas brass is a mixture of copper and zinc. All the solutions are mixtures. For example, salt-solution (brine) is a mixture of common salt (sodium chloride) in water. Please note that the various substances present in a mixture are known as "constituents of the mixture" or "components of the mixture". Some of the examples of mixtures are : Air, Gunpowder, Brass, Salt solution, Sugar solution, Milk, Sea-water, Ink, Kerosene oil,Petrol, Petroleum, Lime-water, Paint, Glass, Coal, Soil, Wood, Blood, Starch solution, Soap solution, Iron and sulphur mixture, Dyes, Alcohol and water, Petrol and water, Chalk-water mixture, Soda water, Soft drinks. Lemonade, Vinegar, Muddy river water, Flour in water. Milk of Magnesia, Butter, Cheese, Face cream, Shaving cream, Hair spray, Smoke, Fog and Mist.
Notes
Matter in Our Surroundings - Notes
1. The Case of a Liquid Solute Dissolved in a Liquid Solvent
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2. 11. Metals Usually Have a Silver or Grey Colour
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8. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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10. 6. Metals are Usually Strong. They Have High Tensile Strength.
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12. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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15. Chemical Formula for daily use material
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21. To Study the Properties of a Compound of Iron and Sulphur
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29. 4. Metals are Lustrous (or Shiny), and can be Polished.
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30. To Study the Properties of a Solution
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31. To Separate a Mixture of Alcohol and Water
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32. To Study the Properties of a Suspension
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35. Experiment to Obtain Coloured Component (Dye) From Ink
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37. 7. Metals are Solids at the Room Temperature
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44. Separation of Mixture Of Two Solids
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45. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
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49. To Study the Properties of a Mixture of Iron and Sulphur
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50. Solutions, Suspensions And Colloids
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