IV. Colloid, Suspension, Emulsion and Rheology

Question 1

Which contains medium size particles or solute?

A. Solution
B. Suspension
C. Colloidal
D. Emulsion

Answer 1

C. Colloidal

Question 2

Which is a colloidal mixture of a liquid dispersed in a gas?

A. Gel
B. Aerosol
C. Emulsion
D. Foam

Answer 2

B. Aerosol

Question 3

In a two phase system if the material is not wet in liquid, the contact angle is:

A. 0 degree
B. 90 degree
C. 45 degree
D. 180 degree

Answer 3

D. 180 degree

Question 4

Colloidal mixture of a gas dispersed in a liquid is:

A. Foam
B. Gel
C. Emulsion
D. Aerosol

Answer 4

A. Foam

Question 5

Section of science that describes the flow and deformation of matter under stress is defined as:

A. Rheology
B. Flowlogy
C. Biology
D. Cosmoslogy

Answer 5

A. Rheology

Question 6

Potassium laurate and sodium laurel sulfate are example of which type of surfactant?

A. Anionic surfactant
B. Amphoteric surfactant
C. Cationic surfactant
D. Nonionic surfactant

Answer 6

A. Anionic surfactant

Question 7

To prepare an emulsion of volatile oils or oleaginous substances of low viscosity which method is user?

A. Dry gum method
B. Forbes method
C. Wet gum method
D. Beaker method

Answer 7

B. Forbes method

Question 8

Acacia is an emulsifying agent which is:

A. Surfactants
B. Hydrophilic Colloids
C. Finely Divided Solid Particles
D. Dispersed medium

Answer 8

B. Hydrophilic Colloids

Question 9

Oil-in-water emulsion (o/w), Internal phase is:

A. Oil
B. Acid
C. Water
D. Base

Answer 9

A. Oil

Question 10

In emulsion preparation, the complete fusion of droplets and separation of the two immiscible phase is:

A. Creaming
B. Flacculation
C. Aggregation
D. Coalescence

Answer 10

D. Coalescence

Question 11

Microemulsion is composed of:

A. Oil, water, emulsifying agent
B. Only Oil, and water
C. Oil, water, surfactant and emulsifying agent
D. Oil, water and surfactant

Answer 11

C. Oil, water, surfactant and emulsifying agent

Question 12

One of the problem in two phase system is particle aggregation or cake formation which can be reduced by using?

A. Solubilizing agent
B. Permeability agent
C. Flocculating agent
D. Wetting agent

Answer 12

C. Flocculating agent

Question 13

Colloidal mixture of a solid dispersed in liquid is:

A. Emulsion
B. Solution
C. Aerosol
D. Foam

Answer 13

B. Solution

Question 14

Acacia is which type of emulsifying agent?

A. Surfactant
B. Finely divided powder
C. Nanoparticle
D. Hydrophilic Colloid

Answer 14

D. Hydrophilic Colloid

Question 15

In which method of emulsion preparations an oil soluble components dissolved in oil phase, water soluble components dissolved in water phase, then two are added and heated up-to 70 degree Celsius?

A. Dry gum method
B. Bottle method
C. Wet gum method
D. Beaker method

Answer 15

B. Beaker method

Question 16

Potassium laurate is an example of which type of surfactant?

A. Non-ionic
B. Natural
C. Anionic
D. Cationic

Answer 16

C. Anionic

Question 17

In emulsion, the deposition of droplets to the upper portion of the liquid is defined as:

A. Aggregation
B. Flocculation
C. Creaming
D. Coalescence

Answer 17

Creaming