question_answer

  (a) Explain the principle of electro dialysis.                                                                                                                           1 (b) In  which gas will be absorbed more rapidly on the surface of charcoal and why?                                                                                                                                                                                                                                                                                            1 (c) How are multi molecular colloides different from macromolecular colloids?                                                   1

Answer:

  (a) Electrodialysis: It is based on the principle that ions can pass through parchment paper faster in electric field than colloidal particles and thus get separated.                                                                                                                  1 (b) will be adsorbed more readily because it has higher critical temperature due to more Vander waal's forces of attraction.                                                                                                                                                                      1 (C)

Multimolecular colloids	Macromolecular colloids
They consist of aggregation of small atoms of molecules e.g.,  sol, sulphur sol.	They consist of aggregation of large molecules, i.e., polymers. e.g.. Albumin sol.                               1