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प्रश्न
List five characteristics by which compounds can be distinguished form mixtures.
उत्तर
| Characteristics | Compound | Mixture |
| 1)Substance | Pure | Impure |
| 2)Way of combination | Two or more components combined chemically | Two or more substances mixed physically |
| 3)Ratio | Combine with a fixed ratio | Ratio of combination is not fixed. |
| 4)Relation between the properties of constituent molecules and compound or mixture | The properties of the constituents are different from compound. | The properties of constituent remain unchanged in mixture. |
| 5) Separation | The constituents of a compound can be separated by chemical methods. | The constituents of a mixture can be separated by physical methods. |
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संबंधित प्रश्न
What is meant by a substance?
Give two reasons for supposing that water is a compound and not a mixture.
Seawater tastes salty due to the dissolved salt. the salinity (the proportion of salts in water) of some water bodies Lonar lake - 7.9 %, Pacific Ocean 3.5%, Mediterranean sea - 3.8%, Dead sea - 33.7%. Explain two characteristics of the mixture from the above information.
Explain the term mixtures.
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 |
Select the correct answer from the choice in the bracket.
A homogenous mixture.
A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?
Milk is a ______.
While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56°C). What technique can be employed to get back the acetone? Justify your choice.
