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प्रश्न
Give three differences between elements & compounds with relevant examples.
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उत्तर
Three differences between elements and compounds :
Element :
- They contain one kind of atoms only e.g. element (Na) Sodium and [Cl] chlorine.
- The elements have their own set of properties e.g. [H] Hydrogen is combustible.
- They cannot be broken down into two or simpler substances by physical or chemical means.
Compound :
- They contain two or more kinds of atoms, e.g. compound — water [H2O].
- The Properties of compounds are entirely new i.e. water [H20] is a liquid and can extinguish the fire.
- It cannot be broken down into two or simpler substances by chemical means.
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संबंधित प्रश्न
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
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