What are protective colloids with example?
What are protective colloids with example?
The protective colloid is a type of lyophilic (water loving) colloid which is used to protect the lyophobic colloids from precipitating in an electrolytic solution. The common example of protective colloids are : gelatin, casein, hemoglobin, egg albumin etc.
Which are protective colloids?
lyophilic colloid
A protective colloid is a lyophilic colloid that when present in small quantities keeps lyophobic colloids from precipitating under the coagulating action of electrolytes.
What is protection and protective colloid?
This protective action of a lyophilic colloid which prevents the coagulation of a lyophobic colloid on the addition of an electrolyte is known as Protection. The lyophilic colloid added to prevent coagulation is known as protective or protecting colloid and the lyophobic colloid is known as a Protected colloid.
How are colloids protected?
Protection of Colloids can be easily precipitated by the addition of a small amount of electrolytes. They can be prevented from coagulation by the previous addition of some stable lyophilic colloids like gelatin, albumin, etc.
What are protective colloids in chemistry class 12?
Protective colloid are lyophilic colloid when present in small quantities keep lyophobic colloids from precipitating under the coagulating action of electrolytes.
Which of the following is the best protective colloid?
Gelatin is best protective colloid because its gold number is .
What are protective colloids and gold number?
Gold number
| Protective Colloid | Gold Number |
|---|---|
| Gelatin | 0.005-.01 |
| Haemoglobin | 0.03-0.07 |
| Egg Albumin | 0.15-0.25 |
| Potato Starch | 20-25 |
Why is gelatin used as protective colloid?
Surface Chemistry. Justify the use of gelatin as a protective colloid. Answer: Gelatin is made from soft bone and cartilages of an animal which have ability to form thermo- reversible gelsand amphoteric character make it as protactive colloid.
Is gelatin the best protective colloid?
Since gelatin is the best protective colloid, hence its gold number is minimum. So, the correct answer is “Option B”. From the above data,we can say that gelatin has a very low value of gold number as compared to other colloids, and hence is a good protective colloid.
Is silica gel a protective colloid?
Lyophilic colloids are more stable than lyophobic colloids. Hence, lyophilic colloids protect lyophobic colloids from precipitation by electrolytes.
Which of the following is best protective colloid?
What is the best protective colloid?
Gelatin
Gelatin is best protective colloid because its gold number is .
Which of the following is most protective colloid?
Thus Gelatin with lowest gold number, act as best protective colloid, therefore option A is correct answer.
Which is best protective colloid?
Which soil is used for protecting colloids?
(v) Soils : Fertile soils are colloidal in nature in which humus acts as a protective colloid.
What are protective colloids define gold number?
The Gold Number is the minimum weight (in milligrams) of a protective colloid required to prevent the coagulation of 10 ml of a standard hydro gold sol when 1 ml of a 10% sodium chloride solution is added to it.
Which sol is used for protecting colloid?
lyophilic sol
When a lyophilic sol is added to the lyophobic sol, the lyophilic particles form a layer around lyophobic particles and thus protect the latter from electrolytes. Lyophilic colloids used for this purpose are called protective colloids.
Why Lyophilic colloids are called protective colloids?
When a lyophilic sol is added to the lyophobic sol, the lyophilic particles form a layer around lyophobic particles and thus protect the latter from electrolytes. Lyophilic colloids used for this purpose are called protective colloids.
Why are Lyophilic sols called protective sols?
This is due to the formation of a protective layer by the lyophilic sols outside lyophobic sols. Lyophilic sols are also called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulation on the addition of a solution of sodium chloride.
Why Lyophilic colloids are protective colloids?
