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Purification of Colloidal Solution

What is aggre...

Question

What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?

A

Peptization

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B

Emulsion

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C

Dialysis

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D

Coagulation

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Solution

The correct option is D
Coagulation

Aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte is called coagulation.

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Q. Peptization is a process of converting a freshly prepared precipitate into a colloidal form by the addition of a suitable electrolyte.

State whether the statement is True or False.

Q. Assertion :The conversion of fresh precipitate to colloidal state is called peptization. Reason: It is caused by addition of common ions.

Q. Which of the following statements are true about peptization? A. A colloidal sol is converted into precipitate B. It is done in the presence of a small electrolyte C. Charges develop on the precipitate during this process D. The charges developed during this process further breaks up into smaller particles of the size of colloids.

Q. Match List I with List II and select the correct answer:-

\begin{matrix} List I & List II (A) Coagulation & (P) Scattering of light (B) Dialysis & (Q) Formation of colloidal solution from precipitates (C) Peptization & (R) Purification of colloids (D) Tyndall effect & (S) Aggregation of colloidal sol \end{matrix}

Q. Match list I with List II and select the correct answer using the codes given below the lists:

List I	List II
(A) Coagulation	(1) Scattering
(B) Lyophilization	(2) Washing of precipitates
(C) Peptization	(3) Purification of colloids
(D) Tyndall	(4) Electrolyte

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