Emulsions I Quiz

What is the definition of an emulsion?

• A mixture of two miscible liquids

• A mixture of two immiscible liquid phases

• A gas-liquid mixture

• A solid-liquid mixture

Which of the following is an advantage of emulsions?

• They are easy to transport

• They can mask the bitter taste of oil soluble drugs

• They do not require shaking before use

• They are always stable at room temperature

What type of emulsion has oil droplets dispersed in water?

• Oil-in-water emulsion

• Microemulsion

• Multiple emulsion

• Water-in-oil emulsion

Which test can be used to identify the type of emulsion based on miscibility?

• Conductivity test

• Viscosity test

• Staining test

• Miscibility test

What is a characteristic of microemulsions?

• They are opaque and unstable

• They cannot be used for drug delivery

• They are only used for external applications

• They have a droplet size of 1nm-1000nm

Which of the following is a disadvantage of emulsions?

• They are easy to prepare

• They require accurate measuring devices for administration

• They can be stored at any temperature

• They are always stable

What is the role of emulsifying agents in emulsions?

• To make the emulsion more volatile

• To increase the viscosity of the emulsion

• To stabilize the emulsion by reducing interfacial tension

• To enhance the flavor of the emulsion

Which of the following is NOT a criterion of a good emulsifying agent?

• Should be chemically stable

• Should be non-toxic

• Should be able to reduce interfacial tension

• Should be expensive

What type of emulsifying agent is derived from vegetable or animal sources?

• Finely divided solids

• Synthetic emulsifying agents

• Amphoteric surfactants

• Natural emulsifying agents

Which type of surfactant is known to form stable oil-in-water emulsions?

• Amphoteric surfactant

• Non-ionic surfactant

• Anionic surfactant

• Cationic surfactant