Chapter 3 Multiple Choice Questions

. If 25 g of a liquid occupies 20 cm³ in a measuring cylinder, what is the density of the liquid?

0.25 g cm^-3

0.8 g cm^-3

1.25 g cm^-3

5 g cm^-3

. Which property measures the resistance of a liquid to flow?

Density

Viscosity

Volume

Solubility

. What is the correct definition of a pseudoplastic liquid?

A liquid which becomes less viscous as the rate of shear increases

A liquid which becomes more viscous as the rate of shear increases

A liquid which becomes less viscous over time when a constant shear stress is applied

A liquid which becomes more viscous over time when a constant shear stress is applied

. What is the kinematic viscosity of a liquid that has a density of 1.2 g cm^-3 and a dynamic viscosity of 2 cP?

0.6 m²s^-1

1.67 m²s^-1

0.6 x10^-6 m²s^-1

1.67 x10^-6 m²s^-1

. What is the correct definition of solubility?

The ability of solid particles to disperse throughout a liquid continuous phase

The ability of a solute to dissolve into a solvent

The rate at which a solute dissolves into a solvent

The ability of immiscible liquid droplets to disperse within a second liquid phase

. What is the concentration of a 0.5 % (w/v) solution when expressed as mg mL^-1?

0.005 mg mL^-1

0.05 mg mL^-1

0.5 mg mL^-1

5 mg mL^-1

. Which of the following excipients may be used to limit the presence of microorganisms in a liquid formulation?

Purified water

Sodium lauryl sulphate

Benzalkonium chloride

Ascorbic acid

. What is the role of xanthan gum within some liquid formulations?

Regulate pH

Control viscosity

Enhance solubility

Enhance stability

. Which of the following liquid dosage forms requires a sterile formulation?

Eye drops

Spray applied to skin

Shampoo

Oral syrup

. Which of the following statements is false?

Liquid formulations for intravenous delivery must be aqueous solutions that do not precipitate in the blood stream.

Parenteral suspensions and oil-based parenteral solutions can only be administered via the intramuscular or subcutaneous routes.

Small-volume parenteral liquids (up to 10 mL) must be administered intravenously but large-volume (up to 500 mL) parenteral liquids may be administered by any route.

Water for injection is a term used to describe sterile purified water that is reserved for the preparation of aqueous medicines for parenteral delivery.

Quiz Content