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प्रश्न
How would you obtain clear water from a sample of muddy water?
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उत्तर
Clear water can be obtained from a sample of muddy water by the method of filtration. In this method, the sample of muddy water is poured through a cloth having fine pores or through a filter paper. Water will pass through the filtering medium, leaving behind the mud.
संबंधित प्रश्न
Differentiate between:
pure and impure substances
Tick the most appropriate answer.
The different constituents of ink are separated by
Fill in the blanks.
Immiscible liquids are separated by using a ________.
Why is filtration a better technique than sedimentation and decantation ?
What is centrifugation ? Also write the principle on which it works.
Match the ideal method of separation of components in a mixture in List I with the appropriate process in List II.
| List I | List II |
| 1. Sand from a mixture of sand and water | A: Separating funnel |
| 2. kerosene from a mixture of kerosene water | B: Sublimation |
| 3. Alcohol from a mixture of methyl alcohol and water | C: Filtration |
| 4. Naphthalene from a mixture of naphthalene and lead chloride | D: Distillation |
| 5. Pure water from impure water | E: Fractional distillation |
Explain with diagram the process used to – separate the following substance from the given mixtures - Lead nitrate [soluble] from a mixture of – lead nitrate & water Le. lead nitrate solution.
A mixture of milk and water can be separated by filtration.
A mixture of powdered salt and sugar can be separated by the process of winnowing.
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 |
