CBSE Class 12-science Answered
Describe any two methods of purifying colloids.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Dialysis is a process in which colloid is placed inside a bag of semi permeable membrane like cellophane or parchment paper which permits ions and not colloids to pass through. The process becomes faster if it is done in electrical field and is called electro dialysis.
Ultrafiltration is a process in which a special pore size filter paper is made by coating normal filter paper with the colloidal particles and is called ultra filters .Filtration can be accelerated by pressure or suction.
Answered by | 04 Jun, 2014, 03:23: PM
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