Preparation of Lyophilic and Lyophobic Sols NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Preparation of Lyophilic and Lyophobic Sols MCQ Questions


7.
Peptization is a method for preparing
A.
Lyophilic sols
B.
Lyophobic sols
C.
Both
D.
Aqueous solutions
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ANSWER :
B. Lyophobic sols
8.
In Bredig’s arc method, the dispersion medium is
A.
Alcohol
B.
Water
C.
Air
D.
Benzene
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ANSWER :
B. Water
9.
Bredig’s arc method is suitable for preparation of
A.
Non-metal sol
B.
Metal sol
C.
Protein sol
D.
Starch sol
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ANSWER :
B. Metal sol
10.
A colloidal sol of arsenious sulphide can be prepared by
A.
Hydrolysis
B.
Double decomposition
C.
Oxidation
D.
Reduction
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ANSWER :
B. Double decomposition
11.

Which of the following is most easily peptized?

A.

CuCl

B.

AgCl

C.

NaCl

D.

CaCl2

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ANSWER :

B. AgCl

12.
Lyophobic colloids are stabilized by
A.
Addition of salt
B.
Electrolytes
C.
Electric charge
D.
Hydration
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ANSWER :
C. Electric charge