We have provided 30 MCQs on Suspensions, Unit-3, 1st semester, Pharmaceutics-1, B. Pharm.
We have covered following topics.
Suspensions: Definition, advantages and disadvantages, classifications, Preparation of suspensions; Flocculated and Deflocculated suspension & stability problems and methods to overcome.
Table of Contents
MCQ on Suspensions
What is a suspension in pharmaceutical preparations?
- A. A clear, transparent liquid
- B. A homogeneous mixture of solid particles and a liquid medium
- C. A solution with high solubility
- D. A gas dissolved in a liquid
Correct Answer: B. A homogeneous mixture of solid particles and a liquid medium
What is the primary advantage of suspensions in pharmaceutical formulations?
- A. Rapid absorption in the gastrointestinal tract
- B. Extended shelf life
- C. Easy preparation
- D. High solubility
Correct Answer: A. Rapid absorption in the gastrointestinal tract
Which of the following is a disadvantage of using suspensions in pharmaceuticals?
- A. Limited stability
- B. Rapid absorption
- C. High clarity
- D. Low viscosity
Correct Answer: A. Limited stability
How can suspensions be classified based on the size of solid particles dispersed in the liquid medium?
- A. Monophasic and biphasic
- B. Macroscopic and microscopic
- C. Flocculated and deflocculated
- D. Transparent and opaque
Correct Answer: B. Macroscopic and microscopic
What term describes the separation of solid particles from a suspension over time, leading to the settling of particles at the bottom of the container?
- A. Emulsification
- B. Sedimentation
- C. Precipitation
- D. Dissolution
Correct Answer: B. Sedimentation
What is the primary method to overcome stability problems in suspensions where solid particles settle over time?
- A. Increasing the particle size
- B. Increasing the viscosity of the liquid medium
- C. Decreasing the particle size
- D. Reducing the solubility of the solid particles
Correct Answer: C. Decreasing the particle size
In a flocculated suspension, how do the solid particles typically arrange themselves within the liquid medium?
- A. As individual, non-interacting particles
- B. As tightly packed aggregates
- C. In a random, disorganized manner
- D. As loosely aggregated clusters
Correct Answer: D. As loosely aggregated clusters
What is the primary advantage of flocculated suspensions compared to deflocculated suspensions?
- A. Longer shelf life
- B. Lower viscosity
- C. Rapid settling of particles
- D. Easy re-dispersion
Correct Answer: D. Easy re-dispersion
What is the primary disadvantage of deflocculated suspensions compared to flocculated suspensions?
- A. Poor stability
- B. High viscosity
- C. Rapid settling of particles
- D. Easy re-dispersion
Correct Answer: A. Poor stability
Which of the following methods can be used to overcome stability problems in suspensions?
- A. Increasing particle size
- B. Increasing solubility
- C. Decreasing viscosity
- D. Decreasing particle size
Correct Answer: D. Decreasing particle size
Question: Which of the following is a correct definition of a suspension?
- A. A heterogeneous mixture in which the dispersed phase is a solid and the dispersing medium is a liquid.
- B. A homogeneous mixture in which the dispersed phase is a solid and the dispersing medium is a liquid.
- C. A heterogeneous mixture in which the dispersed phase is a liquid and the dispersing medium is a solid.
- D. A homogeneous mixture in which the dispersed phase is a liquid and the dispersing medium is a solid.
Correct answer: A. A heterogeneous mixture in which the dispersed phase is a solid and the dispersing medium is a liquid.
Question: Which of the following is an advantage of suspensions?
- A. Suspensions are easy to prepare.
- B. Suspensions are stable.
- C. Suspensions are easy to administer.
- D. All of the above.
Correct answer: D. All of the above.
Question: Which of the following is a disadvantage of suspensions?
- A. Suspensions can settle out over time.
- B. Suspensions can be difficult to filter.
- C. Suspensions can be difficult to sterilize.
- D. All of the above.
Correct answer: D. All of the above.
Classifications of suspensions
Question: Which of the following is a type of suspension based on the size of the dispersed particles?
- A. Coarse suspensions
- B. Colloidal suspensions
- C. Flocculated suspensions
- D. Deflocculated suspensions
Correct answer: B. Colloidal suspensions
Question: Which of the following is a type of suspension based on the nature of the dispersed phase?
- A. Inorganic suspensions
- B. Organic suspensions
- C. Aqueous suspensions
- D. Non-aqueous suspensions
Correct answer: C. Aqueous suspensions
Question: Which of the following is a type of suspension based on the route of administration?
- A. Oral suspensions
- B. Topical suspensions
- C. Injectable suspensions
- D. Ophthalmic suspensions
Correct answer: D. Ophthalmic suspensions
Preparation of suspensions
Question: Which of the following is a method for preparing suspensions?
- A. Wet milling
- B. Dry milling
- C. Levigation
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a suspending agent used in oral suspensions?
- A. Methylcellulose
- B. Xanthan gum
- C. Bentonite
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a preservative used in suspensions?
- A. Sodium benzoate
- B. Methylparaben
- C. Propylparaben
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a flocculated suspension?
- A. A suspension in which the dispersed particles are aggregated together.
- B. A suspension in which the dispersed particles are evenly dispersed throughout the dispersing medium.
- C. A suspension in which the dispersed particles are very small and have a large surface area.
- D. A suspension in which the dispersed particles are relatively large and have a small surface area.
Correct answer: A. A suspension in which the dispersed particles are aggregated together.
Question: Which of the following is a deflocculated suspension?
- A. A suspension in which the dispersed particles are aggregated together.
- B. A suspension in which the dispersed particles are evenly dispersed throughout the dispersing medium.
- C. A suspension in which the dispersed particles are very small and have a large surface area.
- D. A suspension in which the dispersed particles are relatively large and have a small surface area.
Correct answer: B. A suspension in which the dispersed particles are evenly dispersed throughout the dispersing medium.
Which of the following is NOT a method to overcome sedimentation in suspensions?
- A. Using a suspending agent
- B. Using a surfactant
- C. Increasing the viscosity of the dispersing medium
- D. Decreasing the particle size
Correct answer: D. Decreasing the particle size
Question: Which of the following is NOT a method to overcome creaming in suspensions?
- A. Using a suspending agent
- B. Using a surfactant
- C. Increasing the viscosity of the dispersing medium
- D. Matching the density of the dispersed phase and the dispersing medium
Correct answer: D. Matching the density of the dispersed phase and the dispersing medium
Question: Which of the following is NOT a method to overcome aggregation in suspensions?
- A. Using a surfactant
- B. Adjusting the pH of the suspension
- C. Using a deflocculating agent
- D. Increasing the temperature of the suspension
Correct answer: D. Increasing the temperature of the suspension
Question: Which of the following is NOT a characteristic of a flocculated suspension?
- A. The dispersed particles are aggregated together.
- B. The sedimentation rate is high.
- C. The viscosity is low.
- D. The Tyndall effect is weak.
Correct answer: C. The viscosity is low.
Question: Which of the following is NOT a characteristic of a deflocculated suspension?
- A. The dispersed particles are evenly dispersed throughout the dispersing medium.
- B. The sedimentation rate is low.
- C. The viscosity is high.
- D. The Tyndall effect is strong.
Correct answer: C. The viscosity is high.
Question: Which of the following is a type of suspension based on the rheological properties of the dispersing medium?
- A. Newtonian suspension
- B. Non-Newtonian suspension
- C. Colloidal suspension
- D. Flocculated suspension
Correct answer: B. Non-Newtonian suspension
Question: Which of the following is a method to measure the sedimentation rate of a suspension?
- A. Andreasen pipette
- B. Sedimentation balance
- C. Turbidimeter
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a method to increase the stability of a suspension?
- A. Using a suspending agent
- B. Using a surfactant
- C. Adjusting the pH of the suspension
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a type of suspension that is used in cosmetics?
- A. Emulsion
- B. Foam
- C. Gel
- D. All of the above
Correct answer: D. All of the above
Question: Which of the following is a type of suspension that is used in pharmaceuticals?
- A. Oral suspension
- B. Topical suspension
- C. Injectable suspension
- D. All of the above
Correct answer: D. All of the above
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PHARMACEUTICS- I
