Question

According to _________ the power of coagulation of an ion depends upon valency.
A: Brownian motion
B: Hardy-Schulze rule
C: Tyndall effect
D: None of these

Answer 1

Hint:
As we know that formation of blood clot is coagulation. Like when you cut or injure yourself, your body stops the bleeding by just forming a blood clot. So, the action or even a process of a liquid, especially blood, changing to a solid or semi-solid state from a liquid state.

Complete step by step answer:
The quantity of the electrolyte which is required to coagulate a definite amount of a colloid solution depends upon the valency of the coagulating ion. This observation of Hardy schulze is known as Hardy schulze law. As this law that is Hardy Schulze law states that coagulating power of an electrolyte is directly proportional to the valency of the active ion. And the ions are carrying the charge opposite to that of sol particles which are effective in causing coagulation of the solution.
The following are the main points which may stated as follows:
– The effective ions of the electrolyte helps in bringing about coagulation that are those which carry a charge which is opposite to that of colloidal particles. These ions are also called coagulating ions or fluctuating ions.
Greater is the valency of coagulating or fluctuating ions greater is its power to bring about coagulation.
Hence, option B is the correct answer.

Additional information:
There are some properties of colloids:
Like firstly they are heterogeneous mixtures.
The size of particles is too small to be seen with naked eye.
They scatter light passing them making its path visible.
Basically colloids include emulsions, foam, solution and aerosol.

Note: Electrolysis is used to end charge on the colloidal particles. As, when electric current is passed through the colloidal solution, the particles which are charged will move towards the oppositely charged electrode and coagulate due to loss of charge.