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.
The rays emitted by the cathode in a gas discharge tube under low pressure and high voltage of electricity are called cathode rays. Which of the following properties are not related to cathode rays.
The energy gap between two bands so large that it effectively prevents the promotion of electron from the lower to the higher band such energy gap all called.
The process in which ore is heated generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points is called.
