Surface Chemistry Test

Result

Surface Chemistry Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is not a correct match?

A
Butter - O/W type emulsion

B
Vanishing cream - O/W type emulsion

C
Milk - O/W type emulsion

D
Cream - W/O type emulsion

Solution

Butter is an example of water in oil type emulision.
Question 2
4 / -1

Which of the following is not an example of an emulsifying agent?

A
Proteins

B
Gums

C
Soaps

D
Electrolytes
Question 3
4 / -1

The separation of an emulsion into its constituent liquids is known as

A
Emulsification

B
Protection of colloid

C
Coagulation

D
Demulsification

Solution

The separation of an emulsion into its constituents is called demulsification. Various methods of demulsification are freezing, boiling, centrifugation or chemical methods.
Question 4
4 / -1

Which of the following statements given about emulsions is incorrect?

A
The droplets in emulsions are often negatively charged and can be precipitated by electrolytes

B
Emulsion can be diluted with any amount of the dispersed liquid. On the otherhand, the dispersion medium when mixed, forms a separate layer

C
Emulsions can be broken into constituent liquids by heating, freezing, centrifuging, etc

D
Emulsions also show Brownian movement and Tyndall effect

Solution

Emulsions can be diluted with any amount of the dispersion medium. On the other hand, the dispersed liquid when mixed, forms a separate layer.
Question 5
4 / -1

Match the column I with column II with respect to applications of properties of colloids in different fields and mark the approptiate choice.

A
(A) → (iii), (B) → (i), (C) → (ii), (D) → (iv)

B
(A) → (ii), (B) → (iii), (C) → (i), (D) → (iv)

C
(A) → (iii), (B) → (i), (C) → (iv), (D) → (ii)

D
(A) → (i), (B) → (iv), (C) → (iii), (D) → (ii)