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प्रश्न
What is chromatography? For which type of mixture is it used?
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उत्तर
This is one of the latest techniques to separate the coloured components of a mixture when all the components are very similar in their properties. Example: Components of ink are separated by this method. Ink is a mixture of different dyes, which are separated by chromatography because some of the dyes are less soluble and some are more soluble in a solvent.
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संबंधित प्रश्न
Differentiate between:
pure and impure substances
Fill in the blanks.
Immiscible liquids are separated by using a ________.
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
State any one method – to separate the following mixtures – A gas-gas mixture containing – two gases with different densities.
Explain with diagram the process used to – separate the following substance from the given mixtures - Carbon tetrachloride from a mixture of – carbon tetrachloride [heavier component] & water.
Explain with diagram the process used to – separate the following substance from the given mixtures - Different dyes – in their liquid constituent ink.
Select the correct answer from the choice given below to complete the sentence :
The reactive element from the two monoatomic elements is _____________.
Give a reason for the following statement :
Components in a mixture can be separated by physical methods only.
State whether the following statement is true or false.
A mixture of oil and water can be separated by filtration.
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 |
