Colloids
A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions. The size of solute particles in a colloid is bigger than that of a true solution but smaller than those of a suspension. Though colloids appear to be homogeneous to us but actually they are found to be heterogeneous when observed through a high power microscope. So, a colloid is not a true solution. Some of the examples of colloids (or colloidal solutions) are : Soap solution, Starch solution, Milk, Ink, Blood, Jelly and Solutions of synthetic detergents. Colloids are also known as colloidal solutions.
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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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50. To Study the Properties of a Mixture of Iron and Sulphur
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