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.
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Matter in Our Surroundings - Notes
1. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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3. 7. Metals are Solids at the Room Temperature
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4. The Case of a Liquid Solute Dissolved in a Liquid Solvent
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6. 11. Metals Usually Have a Silver or Grey Colour
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7. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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10. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
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12. Separation Of Mixture Of a Solid And a Liquids
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14. To Study the Properties of a Colloid
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19. To Study the Properties of a Compound of Iron and Sulphur
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20. 11. Non-Metals Have Many Different Colours.
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21. 1. Separation by a Suitable Solvent
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26. 2. Separation by a Separating Funnel
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27. 6. Metals are Usually Strong. They Have High Tensile Strength.
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29. To Distinguish a Colloid from a Solution
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32. 3. Metals are Good Conductors of Heat and Electricity.
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33. Experiment to Obtain Coloured Component (Dye) From Ink
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38. To Study the Properties of a Solution
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41. To Separate the Salt-Water Mixture (or Salt-Solution)
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44. 1. Separation by Fractional Distillation
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46. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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48. Chemical Formula for daily use material
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