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प्रश्न
Define the following:
Impure substance
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उत्तर
Impure substance: “A substance in which some other substances are also present in smaller or larger amounts is called an impure substance. Mixtures are impure substances. An example of an impure substance is air.
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संबंधित प्रश्न
Fill in the blank
Mixtures can be ________ or _______
Name the process you would use to separate a mixture of two miscible liquids (like acetone and water).
Matter is classified into the types of mixture, compound and element by applying the criterion ______.
Define the following:
Alloy
Fill in the blanks
_____or ___________ is a process to separate solids dissolved in liquids.
State the technique involved in separating the following:
Iodine crystals and potassium chloride
Match the statements in List I with the correct answer in List II.
| List I | List II |
| 1. Purification of water by adding alum | A: Sublimation |
| 2. Seawater leaving behind common salt | B: Sieving |
| 3. Separation of camphor and potassium chloride | C: Filtration |
| 4. Separation of charcoal from a charcoal-water mixture | D: Sedimentation |
| 5. Separation of bran and wheat flour | E: Evaporation |
Suggest separation technique(s) one would need to employ to separate the following mixture.
Common salt, water and sand
Under which category of mixtures will you classify alloys and why?
List out the characteristics of Mixtures.
