Duduli

Answer:- Precipitation of lyophobic solution particles by electrophoresis is called Cottrell precipitation.

Answer:- It is a process of removing a dissolved substance from a colloidal solution by means of diffusion through suitable membrane.To purify a colloidal solution we use dialysis process.

Answer:- The process of removing an adsorbed substance from a surface on which it is adsorbed is called desorption. At equilibrium state,    Amount of adsorption=Amount of desorption

Answer :- Peptization may be defined as the process of converting a precipitate into colloidal sol. by Shaking it with dispersion medium in the presence of a small amount of electrolytes. * The electrolyte used for this propose is called peptizing agent.e.g kCl etc. * During peptization, the precipitate adsorbs one of the ion of the electrolyte on its surface. e.g And ultimately the bond is break between the precipitate.and we get colloidal particle.

Explanation:- The variation in the amount of gas adsorbed by the adsorbent with pressure at constant temperature can be expressed by means of a curve termed as adsorption isotherm. According to freundlich isotherm,     The extent of adsorption of a gas per unit mass of adsorbent depends upon the pressure of that gas. I.e Look at the Graph,(x/m) vs (p) Equation (1) is the general form of freundlich adsorption isotherm. Case-1( at low pressure) If  x/m =kp¹ That implies 1/n=1 I.e  n=1 So at low pressure freundlich adsorption isotherm holds good because initially their is more adsorption occur. Case-2 (at high pressure) If x/m=constant  i.e1/n=0 That implies n=infinity So at high pressure x/m independent on pressure because after saturation pressure their is no adsorption occur due to no space on adsorbent. At saturation pressure Amount of gas adsorbed=amount of gas desorbed. Look at the logarithm graph of equation (1) This is all about freundlich adsor

Answer:- We know lyophobic solution are more stable due to presence of charge on their  Collaidal particles.If somehow the charge  is removed,then the collaidal particles come nearer(because in case their is no attractive or repulsive force) to form aggregate(or coagulate)and became settle down under the force of gravity in solution.That process of settling of collaidal particles is called coagulate or precipitation of the solution.

Answer:- Catalysis process broadly divided into two groups: (A) Homogeneous catalysis :-      If the reactants and the catalyst are      Present in same phase in a chemical           reaction then the catalysis process is      known as homogeneous catalysis. e.g (B) Heterogeneous catalysis:-       If the reactants and the catalyst are in         Present different phase in a chemical          reaction then the catalysis process is          known as heterogeneous catalysis. e.g Are you satisfied by this answer       

Electrophoresis:- To determine charge on colloidal particles we study electrophoresis experiment. Definition: The movement of colloidal particles under an applied electric potential is called electrophoresis . In this experiment positively charged colloidal particles move towards cathode and negativity charged colloidal particles move towards anode and we can easily determine which colloidal particles are positively or negativity charged. Electroosmosis:- When electrophoresis i.e movement of particles is prevented by some suitable means, it is observed that the dispersion medium begins to move in the direction of electric field (anode to cathode).this phenomenon is called electroosmosis.