Question

1.Explain why filter paper cannot be used to separate colloids
2.How will you separate a mixture containing kerosene and petrol ,which are miscible with each other?

Answer 1

Answer:

filter paper cannot be used to separate colloids because the particles of colloidal solution is very,very big . that's why it does not dissolve in water completely ..

Answer 2

Answer:

1- The size of colloidal particles is less than inm, while the size of poi present in an ordinary filter paper is larger than inm .Hence a colloid solution can not be separated by filtration.

2- A mixture of two miscible liquids having a difference in their boiling points more than 25°C can be separated by the method of simple distillation.