Question

E. ANSWER THE FOLLOWING QUESTIONS :
1. State the principle underlying (1) sublimation (i) filtration.
2. What are homogeneous mixtures ?
3. How can you separate mixture of petrol and water ?
4. What is sedimentation ?
5. For which type of solutions is filtration carried ?
6. How will you separate a mixture of ammonium chloride and common salt 2
7. Give two differences between a compound and a mixture.
8. How will you separate a mixture of iodine, iron filings and salt from a mixture ?
9. What is loading ? Explain the process of loading with alum.
10. How chromatography is helpful in separating mixtures of liquids ?
11. Almost all the substances of our daily use are mixtures. Comment.
12. Demonstrate the separation of pure water from impure water by using distillation process.
13. Explain in detail separation of kerosene oil from water by using a separating funnel

Answer 1

1. SUBLIMATION - this method is used to separate those components from a mixture which can sublime on heating.

FILTRATION - this method is used to separate solids from liquids.

2. A Homogeneous mixture is a mixture that is uniform in its composition

properties throughout

3. By the process of decantation by using a separating funnel

4. It is defined as the separation process in which solids are separated from the

It is defined as the separation process in which solids are separated from the liquid

5. filtration is carried for type of solutions that have insoluble impurities in the

solution

6. by the process of SUBLIMATION

7. MIXTURES :

• properties of a mixture reflect the properties of the materials it contains
• no uniform composition
• can be separated by physical means

COMPOUNDS :

• different properties from that of the elements that make up the compounds
• definite composition definite ratio /formula
• cannot be separated by physical means.

8. We will separate a mixture of iron filings, chalk powder and common salt by using a magnet followed by filtration and evaporation. First, a magnet is moved on a mixture of iron filings, chalk powder and common salt. In the process, iron filings are separated by the magnet.

HOPE THIS HELPS YOU A BIT...