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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
Sedimentation and decantation
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उत्तर
Sedimentation and decantation : The settling down of suspended, insoluble, heavy, solid particles in a solid- liquid mixture when left undistrubed is called sedimentation.
The solid which settles at the bottom is called sediment while the clear liquid above it is called supernatant liquid.
The process of pouring out the clear liquid, without disturbing the sediment, is called decantation.
Example : A mixture of sand and water.
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संबंधित प्रश्न
Name the main metal present in the following:
Chocolate wrappers
Fill in the blank:
________ and _______ are pure substances.
Fill in the blank
A pure substance has definite _______ and constant _________.
Fill in the blank
Use of a __________ to separate the components of a mixture of solids is based on the difference in the size of the components.
Fill in the blank.
_________ is used when the constituents of a mixture of solids have a difference in their weights.
Match the columns.
| Column A | Column B |
| 1. To separate grain from chaff | a. filtration |
| 2. To seperat sawdust from water | b. sedimentation and decantation |
| 3. To separate iodine from sodium chloried | c. winnowing |
| 4. To separate iron fillings from sand | d. sublimation |
| 5.It is used to separate sand and water | e.magnetic separation |
| f. handpiicking |
Differentiate between the following.
solution and suspension
What is centrifugation ? Also write the principle on which it works.
Differentiate between the terms elements, compounds, and mixtures with suitable examples.
When two or more elements combine together they form ______.
