questions on emulsion (ipp)


1. What is an emulsion?
   A. A solid dispersed in a liquid
   B. A liquid dispersed in a gas
   C. A liquid dispersed in another immiscible liquid
   D. A gas dispersed in a solid
   Answer: C

2. What is the term for the liquid in which droplets are dispersed in an emulsion?
   A. Internal phase
   B. Discontinuous phase
   C. Continuous phase
   D. Droplet phase
   Answer: C

3. Which type of emulsion is described as oil droplets dispersed in water?
   A. W/O
   B. O/W
   C. Multiple
   D. Nanoemulsion
   Answer: B

4. Which test involves adding an emulsion to water or oil to determine its type?
   A. Conductivity test
   B. Dye solubility test
   C. Cobalt chloride paper test
   D. Dilution test
   Answer: D

5. Which emulsifying agent classification relies on adsorption to interfaces?
   A. Synthetic Surface active agents
   B. Semi synthetic agents
   C. Natural agents
   D. Finely divided solid particles
   Answer: D

6. What is the desired characteristic of a preservative used in emulsions?
   A. Highly toxic
   B. Effective against fungus, yeast, and bacteria
   C. Unstable to heat and storage
   D. Incompatible with other ingredients
   Answer: B

7. What type of emulsion is recommended for intravenous administration?
   A. W/O
   B. O/W
   C. Multiple
   D. Nanoemulsion
   Answer: B

8. What type of agent is typically used to reduce the interfacial tension in emulsions?
   A. Thickening agents
   B. Gelling agents
   C. Surfactants
   D. Preservatives
   Answer: C

9. Which method of emulsion preparation involves mixing the gum with oil before adding water?
   A. Wet Gum Method
   B. Continental Method
   C. Bottle Method
   D. Forbes Method
   Answer: B

10. Which of the following is an example of an antioxidant used in emulsions?
    A. Benzoic acid
    B. Gallic acid
    C. Phenol
    D. Benzalkonium chloride
    Answer: B

11. What is the term for the phase that forms a coherent, water-repellent film in W/O emulsions?
    A. Continuous phase
    B. Droplet phase
    C. Discontinuous phase
    D. External phase
    Answer: A

12. Which test is used to determine the conductivity of an emulsion?
    A. Dilution test
    B. Dye solubility test
    C. Conductivity test
    D. Cobalt chloride paper test
    Answer: C

13. What is the effect of creaming in emulsions?
    A. Reversible instability
    B. Irreversible instability
    C. Increased globule size
    D. Reduced number of globules
    Answer: A

14. Which emulsion type can be described as producing a positive conductivity test?
    A. O/W
    B. W/O
    C. Multiple
    D. Nanoemulsion
    Answer: A

15. Which process is characterized by droplets merging to form larger particles?
    A. Creaming
    B. Flocculation
    C. Coalescence
    D. Sedimentation
    Answer: C

16. What should be the concentration of dispersed phase for optimal emulsion stability?
    A. 10-20%
    B. 20-30%
    C. 30-60%
    D. 70-80%
    Answer: C

17. Which method is useful for the preparation of emulsions with volatile and non-viscous oils?
    A. Wet Gum Method
    B. Dry Gum Method
    C. Bottle Method
    D. Continental Method
    Answer: C

18. What type of multiple emulsion consists of oil droplets surrounded by an aqueous phase?
    A. O/W/O
    B. W/O/W
    C. Nanoemulsion
    D. Macroemulsion
    Answer: B
19. Which natural hydrocolloid emulsifying agent is of plant origin?
    A. Gelatin
    B. Cholesterol
    C. Acacia
    D. Wool fat
    Answer: C

20. Which physical instability involves the oil separating from water to form a continuous layer?
    A. Coalescence
    B. Flocculation
    C. Phase inversion
    D. Breaking (Cracking)    Answer: D

21. What is the phase in W/O emulsions where water is dispersed?
    A. Continuous phase
    B. Internal phase
    C. Discontinuous phase
    D. Droplet phase
    Answer: C
22. Which type of emulsion is generally preferred for external use due to its cooling effect?
    A. W/O
    B. O/W
    C. Multiple
    D. Nanoemulsion
    Answer: B
source : #Apothecary wizard
@PharmacyRxplus