Separation of mixture questions | Grade VIII

1. Define mixture.
2. Why is air called mixture ?
3. Write the types of mixture .
4. Define homogeneous and heterogeneous mixture .
5. Define separation of mixture .
6. Write the different types of separation of mixture .
7. Define centrifugation and centrifuge .
8. What type of mixture can be separated by centrifugation process ?
9. Write the advantages of centrifugation .
10. Define chromatography .
11. What type of mixture can be separated by chromatography ?
12. Write the advantages of chromatography .
13. What is paper chromatography ?
14. What kind of materials can be use in chromatography instead of filter paper ?
15. Define crystal and crystallization .
16. How can you prepare crystals ?
17. How can you make big crystals ?
18. What type of mixture can be separated by crystallization ?
19. If two substances move with the same speed through medium , why chromatography is not suitable ?
20. Which method of separation is suitable for following .
    1. Water and sugar .
    2. Iodine and salt .
    3. Alcohol and water .
    4. Red and blue ink .
    5. Sand + water .
    6. Sand and sugar .
    7. Cream from milk .
    8. Blood cells from blood .
    9. Drugs from blood .
    10. Iron filling from sad .
    11. Sand and camphor .
    12. Ammonium Chloride from sand .
21. Which method is suitable to separate pure and rock salt .
22. How can you prepare crystal of copper sulphate .
23. Draw the diagram of crystal of :
    1. Salt
    2. Alum
    3. Copper sulphate