The process of removing disolved impurities from a colloidal system, by means of diffusion through a suitable membrane under the influence of an electric field , is called.
Long diseases are about four times more in urban areas as compared to rural areas. This is due to the presence of which of the following. in atmosphere.
The atomic number of Potassium is 19 and that of manganese is 25. Although the coloured of MnO4 is dark violet yet the K+ is colourles.. This is due to the fact that