Intraseemster Evaluation (E)n

Which electrolytes will precipitate a negatively charged colloid to a greater extent?

• Na⁺

• Ba⁺²

• Fe⁺²

• Fe⁺³ 

The process in which a colloid is placed inside a bag of semi-permeable membrane like cellophane or parchment paper which permits ions and not colloids to pass through is called

• Peptization

• Emulsion

• Coagulation

• Dialysis

Solutions of proteins and starch in water are examples of the colloidal type

• Hydrophilic 

• Hydrophobic

• Lyophilic 

• Lyophobic

The Electrodialysis method is employed in colloidal chemistry for

• Identification

• Preparation

• Purification

• Stabilization

Sulfur sol is an example of ______ colloid.

• Association

• Hydrophilic

• Lyophilic

• Lyophobic

In high concentrations, electrolytes destabilize a lyophilic sol by a process termed as

• Coagulation

• Dilution

• Salting out

• Solvation

When the particle size is lesser than 1nm then it is called

       

• Molecular dispersion

• Colloidal dispersion

• Suspensions

• Emulsion

The potential difference that develops when particles settle under gravity is called

• Streaming potential

• Oxidation potential

• Reduction potential

• Sedimentation potential

________ is directly proportional to the molecular weight of lyophilic colloids.

• Solubility

• Turbidity

• Density

• None of these

_______ is a method of combining negatively and positively charged hydrophilic colloids.

• Coacervation

• Peptization

• Flocculation

• Coagulation