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select correct statement (s) : blood is ...

select correct statement (s) : blood is a colloidal solution, Alum is used in water purification, River water is a colloidal solution of clay, Colloidal medicines are more effective due to large surface area.

A

Loading

B

Sedimentation

C

Separating magnetic substances

D

None of these

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select the correct statement (s) : A sol is prepared by addition of excess of AgNO_(3) solution in Kl solution . The charge likely to develop on colloidal particle is positive, the effects o pressure on physical adsorption is high if temperature is low, Ultracentrifugation process is used for preparation of colloids, Gold number is the index for extent of gold plating done.

select correct statement (s) : lyophobic colloids are used to protect lyophillic colloids, Dehydrating agent is used to coagulation sols, Rubber is obtained by coagulation of latex, sometimes ,the rainfall occurs when two oppositely charged clouds meet.

The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal part!cles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. Which charge is responsible for stability of colloidal particles ?

Read the given passage and answers following questions : The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal particles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of, dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation , by electrophoresis, by persistent dialysis or by heating or cooling. Answer the following questions : Which electrolyte is most effective for coagulating Fe(OH)3 sol?