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प्रश्न
Explain the difference between Mixture and compounds.
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उत्तर
| Mixture | Compound | |
| 1 | It is obtained by the physical combination of any two substances. | It is formed when two or more substances chemically combine in a fixed ratio. |
| 2 | The composition of the constituents present in a mixture is not fixed. | The composition of elements present in a compound is fixed. |
| 3 | It displays the properties of all its constituents. | It may or may not show the properties of its constituent elements. |
| 4 | The constituents of a mixture can be separated using physical methods. | The constituent elements of a compound can be separated only by using chemical methods. |
| 5 | No change of energy is involved during the formation of a mixture. | A change of energy is involved during the formation of a compound. |
संबंधित प्रश्न
Name the process by which the components of following mixtures can be separated.
- Iron and sulphur
- Ammonium chloride and sand
- Common salt from sea water
- Chaff and grain
- Water and mustard oil
- Sugar and water
Select the correct alternative from the choices given for the following statement:
A set of mixture is
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture.
Name the elements present in Ammonia
Write the molecular formulae of compound carbon monoxide
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to properties
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
Match the following.
| Iron | For making wires |
| Copper | Sewing needle |
| Tungsten | As a fuel for ignition in rocket |
| Boron | Making the filament of a bulb |
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is known to form the largest number of compounds.
