Question

Which one of the following impurities present in colloidal solution cannot be remove by electrodialysis?

• A. Sodium chloride
• B. Potassium sulphate
• C. Urea
• D. Calcium chloride
• E. Magnesium chloride

Answer 1

Answer: (C)

Electrolysis is the technique by which electrolytic impurities can be removed. Hence, urea, being non-electrolyte cannot be removed by this method.