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प्रश्न
State whether the following statement is true or false.
A mixture of wheat grains and wheat flour can be separated by sieving.
पर्याय
True
False
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उत्तर
This statement is True.
Explanation:
-
Sieving is a method used to separate components of different sizes.
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In the case of wheat grains (larger in size) and wheat flour (very fine powder):
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When passed through a sieve, the flour passes through the tiny holes,
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The grains stay on top of the sieve.
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This is a common technique used in households and industries.
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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 |
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| Column A | Column B | ||
| 1. | Separation of salt from saltwater | a. | Magnetic separation |
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| 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 |
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| (e) | Rice flour mixed with kidney beans | (v) | Evaporation |
