Is Matter Around Us Pure
If we observe some sugar and some soil (mitti) placed on two different sheets of paper with a magnifying glass, we will find that the colour, shape and size of all the particles of sugar are the same, but the soil contains particles of different colours, shapes and sizes. For example, the soil contains clay particles,some grass particles and even some dead insects, etc. Now, sugar which contains particles of only one kind is called a pure substance whereas soil which contains particles of different kinds is called an impure substance (or mixture). From this we conclude that all the matter around us is not pure. The matter around us is of two types : pure substances and mixtures. The mixtures are impure substances. We will now discuss pure substances and mixtures in a little more detail.
Notes
Matter in Our Surroundings - Notes
2. The Case of a Liquid Solute Dissolved in a Liquid Solvent
Show Notes
3. 3. Non-Metals are Bad Conductors of Heat and Electricity.
Show Notes
4. 11. Metals Usually Have a Silver or Grey Colour
Show Notes
6. To Study the Properties of a Colloid
Show Notes
11. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
Show Notes
13. Separation Of Mixture Of a Solid And a Liquids
Show Notes
15. 1. Separation by a Suitable Solvent
Show Notes
16. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
Show Notes
17. 11. Non-Metals Have Many Different Colours.
Show Notes
20. 6. Metals are Usually Strong. They Have High Tensile Strength.
Show Notes
22. To Study the Properties of a Compound of Iron and Sulphur
Show Notes
27. To Study the Properties of a Solution
Show Notes
34. To Separate a Mixture of Alcohol and Water
Show Notes
35. 3. Metals are Good Conductors of Heat and Electricity.
Show Notes
36. Separation of Mixture Of Two Solids
Show Notes
39. To Separate the Salt-Water Mixture (or Salt-Solution)
Show Notes
41. Chemical Formula for daily use material
Show Notes
46. To Study the Properties of a Suspension
Show Notes
47. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
Show Notes
50. 7. Metals are Solids at the Room Temperature
Show Notes
