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प्रश्न
Compare the properties of iron [II] sulphide with the iron-sulphur mixture, considering iron [II] sulphide as a compound & particles of iron & sulphur mixed together as an example of a mixture.
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उत्तर
Iron and sulphur mixture :
- The constituents i.e. iron and sulphur are seen separately.
- Iron attracts and clings to the magnet.
- On adding dil. HC1 to the mixture H2 gas evolves.
Iron [II] sulphide is a compound
- It is a black solid.
- On bringing a magnet near it we cannot separate iron.
- On adding dil. HCl to it H2S gas evolves.
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संबंधित प्रश्न
State any one method – to separate the following mixtures – A gas-gas mixture containing – two gases with different densities.
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Potassium nitrate from a mixture of – potassium nitrate & potassium chlorate.
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A soluble solid is separated from an insoluble solid by ____________.
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What is meant by separation?
State whether the following statement is true or false.
A mixture of wheat grains and wheat flour can be separated by sieving.
Match the mixtures in column I with their method of separation in column II.
| COLUMN I | COLUMN II | ||
| (a) | Oil mixed in water | (i) | Sieving |
| (b) | Iron powder mixed with flour | (ii) | Hand picking |
| (c) | Salt mixed with water | (iii) | Decantation |
| (d) | Lady’s finger mixed with french beans | (iv) | Magnet |
| (e) | Rice flour mixed with kidney beans | (v) | Evaporation |
Name the two phases in the separation of the mixtures in chromatography.
