Question

F. Answer the following questions in brief.
1. Give two examples each of mixtures and pure substances that we come across in
our daily life
What is the basis of using handpicking as a method of separation?
(3. How is cream separated from milk?
4 Why salt is a pure substance and salt solution is considered to be a mixture?
(5. How will you separate water from petrol?
6. Name and briefly explain any hvo methods that can be used to separate insoluble
solids from their solutions.
7. Explain how alum helps to separate suspended impurities from a mixture of sand
and water?
8. State any two important functions of water.
9. Complete the following table
Type of mixture
Example
Tiny particles of clay suspended in water
Solid-solid mixture
Soot and ash in air
Liquid-gas mixture
10. How will you separate a mixture of dried peas, uncooked rice and plain flour?
( 11. What do a vacuum cleaner and tea strainer have in common?
12. Draw a flowchart to show the method of separating a mixture of sand, nails and
plastic beads.
wate:​

Answer 1

Answer:

In dairies the process of Centrifugation is used for this process. The milk to be skimmed is put in a closed container in big centrifuge machine. ... Due to this the milk separates into 'cream' and 'skimmed milk'. The cream being lighter, floats over the skimmed milk and can be removed.

Answer 2

In dairies the process of Centrifugation is used for this process. The milk to be skimmed is put in a closed container in big centrifuge machine. ... Due to this the milk separates into 'cream' and 'skimmed milk'. The cream being lighter, floats over the skimmed milk and can be removed.