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प्रश्न
Visit a nearby paddy field and rice mill and note down the different separating techniques used there. Is technology replacing some traditional practices?
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उत्तर
Do it yourself.
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संबंधित प्रश्न
Differentiate between:
pure and impure substances
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Baking Soda
How is sodium chloride different from its constituent elements ?
Tick the most appropriate answer
The methods of separating components of a given mixture are based on the
- physical properties and state of the components.
- colour of the components only.
- state of the components.
- none of these
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.
Sodium chloride and potassium nitrate
Name the following:
The heavier liquid component from mercury and water.
State any one method – to separate the following mixtures – Two solid mixtures one of which – dissolves in a – particular solvent and other does not
Give a reason for the following statement :
Centrifugation can be used for separating an insoluble heavier solid, present in an – insoluble solid-liquid mixture.
Give a reason for the following statement :
Zinc is considered an element, while zinc sulphide is considered a compound.
Match the following
| Column A | Column B | ||
| 1. | Separation of salt from saltwater | a. | Magnetic separation |
| 2. | Separation of tea leaves from tea extract | b. | Evaporation |
| 3. | Separation of sand and iron filings | c. | Churning |
| 4. | Separation of butter from curds | d. | Filtration |
