Drug delivery Ngo quiz

Suppositories

Which of the following is an example of a solid in solid emulsion?

emulsion

Creams and lotions are examples of a(n)

gels

Which of the following is an example of liquid in solid dispersion?

heterogenous dispersion

In which type of dispersion, homogenous or heterogenous, is the dispersed phase physically distinguishable from the medium in which it is dispersed?

suspension

Which of the following is an example of solid in liquid dispersion?

Coarse dispersions

Ibuprofen suspension is an example of

hydrophilic colloids

insulin and albumin are examples of

True

Creams tend to separate from the dispersion medium by rising.

Tyndall effect

The light scattering properties of colloidal systems is called

Vial A is saline solution and vial B is albumin solution

A physician has two injection vials, A and B, which are unlabeled. One is saline, and the other albumin-containing solution. They look very similar. A pharmacist is consulted to identify vials A and B.

The pharmacist shines light through the two vials.

Solution A does not scatter light when light passes through. Solution B scatters light when light passes through.

Which of the following statements is true regarding vials A and B?

Increases

According to Stoke's equation, an increase in the crystal particle size of a coarse suspension,(--------), the sedimentation rate of the suspension:

Decreases

According to Stoke's equation, an increased viscosity of a coarse suspension,(--------), the sedimentation rate of the suspension:

49 dynes/cm

If the length of the bar, L, is 5 cm and the mass required to break a soap film is 0.50 g, what is the surface tension of the soap solution? Recall that the downward force equals the mass multiplied by the acceleration due to gravity. With g=9.81 m/s^2= 981 cm/s^2?

1 dyne/cm= 1 g/s^2

Liquid and liquid

What are the two phases in contact for emulsion, creams, and lotions?

Colloidal dispersion

A bottle of milk is an example

low

When oil-loving groups in a surfactant are predominant, the hydrophilic-lipophilic balance is...

high

When water-loving groups in a surfactant are predominant, the hydrophilic-lipophilic balance is...

True

The properties of the molecules forming the suspension interface are sufficiently different from those in the bulk of each phase.

2-3

What is anti-foaming agent's Hydrophilic Lipophilic Balance (HLB) range?

suspension

A liquid-solid interface is found in a(n)