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The protecting power of lyophilic colloi...

The protecting power of lyophilic colloidal sol is expressed in terms of

A

Critical miscelle concentration

B

Oxidation number

C

Coagulation value

D

Gold number

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**Step-by-Step Solution:** 1. **Understanding Lyophilic Colloids**: Lyophilic colloids are colloidal systems that have a strong affinity for the dispersion medium (solvent). They are stable and do not easily precipitate out of the solution. 2. **Role of Lyophilic Colloids**: When a lyophobic colloid (like gold sol) is present, it can be destabilized by the addition of electrolytes (like NaCl). The charged particles in the colloid repel each other, preventing aggregation and precipitation. 3. **Effect of Electrolytes**: The addition of an electrolyte can neutralize the charge on the colloidal particles, allowing them to come together and form larger aggregates, which can lead to precipitation. 4. **Preventing Precipitation**: To prevent the precipitation of lyophobic colloids when an electrolyte is added, a lyophilic colloid can be introduced. The lyophilic colloid forms a protective layer around the particles, stabilizing them and preventing aggregation. 5. **Gold Number**: The effectiveness of a lyophilic colloid in protecting a lyophobic colloid from precipitation is quantified by a term called the "Gold Number." The Gold Number indicates the minimum amount of lyophilic colloid (in milligrams) required to prevent the precipitation of a given amount of lyophobic colloid. 6. **Conclusion**: Therefore, the protecting power of a lyophilic colloidal sol is expressed in terms of the Gold Number. ---
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The protcting power of lyophilic colloidal solution is expressed in terms of

The protective power of lyophilic sol is

the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. which of the following statement (S) is / are correct?

the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. gold number given an indication of

the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. On addition of one mL of sloution of 10 % NaCl to 10 mL. of red gold sol in presence of 0l.025 g of starch the coagultion is just prevented . the gold number of starch is

Assertion : Lyophilic colloids such as starch, gelatin etc, act as protective colloids. Reason : Protective power of lyophilic coloids is expressed in terms of gold number.