Advertisements
Advertisements
प्रश्न
Define the following:
Impure substance
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
How will you separate a mixture of sodium chloride and sand ?
Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel ?
- water and kerosene mixture
- water and acetone mixture
Give reasons for your answer.
Give reason:
Why do sugar and water retain their individual properties in a sugar solution?
Give two examples of the following type of mixture.
liquid-gas
Define Immiscible liquids
With reference to the mixture of iron and sulphur, state the main characteristics of the mixture.
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 |
Give the characters a mixture.
A mixture of chloroform and water are taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of ______ and the lower layer will be that of ______.
What does the LPG (Liquefied petroleum gas) contain?
