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Determination of Sedimentation Volume with Effect of Different Concentrations of a Single Suspending Agent

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1. Sedimentation volume (F) is defined as:

a: The ratio of drug solubility to solvent volume Explanation

Explanation

b: The ratio of dispersed phase to continuous phase Explanation

Explanation

c: The ratio of final sediment volume to initial suspension volume (Vu/Vo) Explanation

Explanation

d: The viscosity of the suspension Explanation

Explanation

2. A high sedimentation volume (F) in a suspension indicates:

a: Poor suspension stability Explanation

Explanation

b: Rapid sedimentation Explanation

Explanation

c: Good physical stability and easy redispersion Explanation

Explanation

d: Excessive drug settling Explanation

Explanation

3. According to Stokes’ Law, the sedimentation rate is inversely proportional to:

a: Particle size Explanation

Explanation

b: Density of dispersed phase Explanation

Explanation

c: Viscosity of the medium Explanation

Explanation

d: Temperature Explanation

Explanation

4. The main function of a suspending agent in a suspension is to:

a: Increase the solubility of the drug Explanation

Explanation

b: Increase viscosity and reduce sedimentation rate Explanation

Explanation

c: Improve drug color and taste Explanation

Explanation

d: Decrease particle size Explanation

Explanation

5. Which of the following is an example of a commonly used suspending agent?

a: Sodium chloride Explanation

Explanation

b: Lactose Explanation

Explanation

c: Sodium carboxymethyl cellulose (sodium CMC) Explanation

Explanation

d: Magnesium oxide Explanation

Explanation

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