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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
Select the correct alternative from the choices given for the following statement:
A pure liquid is obtained from a solution by :
Differentiate between the following.
Supernatant liquid and Fill rate
Differentiate between the following
Filter Paper and Alum
Is food that we eat a mixture ?
Name two methods by which solid-solid mixtures can be separated.
Filtration is a method used to separate fine particles of solid from a liquid.
A separating funnel can be used for separating a mixture of immiscible liquids. True or false?
Give a reason for the following statement:
If fractional distillation is carried out using a liquid-liquid mixture, one liquid will remain in the flask and the other will be collected in the receiver.
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?
