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प्रश्न
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Solvent extraction method
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उत्तर
Solvent extraction method : This method is used when one of the solid components is soluble in a liquid.
Example : A mixture of sand and salt can be separated by this method. Salt gets dissolved in water while sand settles down in the container. The salt solution is then decanted. Salt is separated from the solution by evaporation. In this way, they can be separated.
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संबंधित प्रश्न
The composition and properties of a _________ mixture is uniform throughout.
Give one word answer
The solid particles which remain on the filter paper after the filtration
Select the correct alternative from the choices given for the following statement:
A pure liquid is obtained from a solution by :
Is food that we eat a mixture ?
Filtration is a method used to separate fine particles of solid from a liquid.
When we mix a drop of ink in water we get a ______.
State whether true or false. If false, correct the statement.
Buttermilk is an example of heterogeneous mixture.
A ______ mixture has no distinguishable boundary between its components.
Four mixtures are given below.
- Kidney beans and chick peas
- Pulses and rice
- Rice flakes and corn
- Potato wafers and biscuits
Which of these can be separated by the method of winnowing?
Read the story titled “WISE FARMER” and tick the correct option to complete the story.
A farmer was sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he hand picked/threshed them. After gathering the seed grains he wanted to separate the stones and husk from it. His wife winnowed/threshed them to separate the husk and later sieved/hand picked to remove stones from it. She ground the wheat grains and sieved/filtered the flour. The wise farmer and his wife got a good price for the flour. Can you tell why?
