Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject physical pharmaceutics II. Read following article for your reference.
Derived Properties Of Powders » PHARMACAREERS
- What is porosity in the context of powders?
- a) The color of the powder
- b) The proportion of void space in a bulk powder
- c) The taste of the powder
- d) The smell of the powder
- What is the packing arrangement in powders?
- a) The way particles are arranged in a compact form
- b) The color distribution within the powder
- c) The shape of individual particles
- d) The temperature of the powder
- Which of the following terms describes the density of a powder without any spaces between particles?
- a) Bulk density
- b) Tap density
- c) True density
- d) Apparent density
- What is bulk density?
- a) The density of a powder including the void spaces between particles
- b) The density of individual particles
- c) The density of a powder after it has been compacted
- d) The density of a liquid
- Which method is used to measure the bulk density of a powder?
- a) Sieving
- b) Pycnometry
- c) Gas adsorption
- d) Graduated cylinder
- What is tap density?
- a) The density of a powder after it has been subjected to a standard tapping procedure
- b) The density of individual particles
- c) The density of a powder without any compaction
- d) The density of a liquid
- Why is the measurement of tap density important in pharmaceuticals?
- a) It affects the color of tablets
- b) It helps in understanding the compaction properties of powders
- c) It changes the taste of tablets
- d) It determines the odor of tablets
- What is the true density of a powder?
- a) The density of the powder including the void spaces
- b) The density of the particles themselves, excluding void spaces
- c) The density after tapping
- d) The apparent density of the powder
- Which instrument is commonly used to measure the true density of powders?
- a) Pycnometer
- b) Sieve analyzer
- c) Viscometer
- d) Micrometer
- What is the term used to describe the flowability of powders?
- a) Porosity
- b) Permeability
- c) Rheology
- d) Fluidity
- Why is flowability important in powder processing?
- a) It affects the color of the powder
- b) It influences the ease of handling and processing of powders
- c) It changes the taste of the powder
- d) It determines the odor of the powder
- Which method is used to assess the flow properties of a powder?
- a) Angle of repose
- b) Spectrophotometry
- c) Gas chromatography
- d) Colorimetry
- What does a low angle of repose indicate about a powder’s flow properties?
- a) Poor flowability
- b) Good flowability
- c) High density
- d) High porosity
- What is the Hausner ratio?
- a) The ratio of bulk density to tap density
- b) The ratio of true density to bulk density
- c) The ratio of particle size to shape
- d) The ratio of porosity to permeability
- Which value of the Hausner ratio indicates poor flow properties?
- a) Less than 1
- b) Greater than 1.25
- c) Equal to 1
- d) Greater than 2
- What is the Carr’s index?
- a) A measure of the flowability and compressibility of a powder
- b) A measure of the color of a powder
- c) A measure of the taste of a powder
- d) A measure of the density of a powder
- Which Carr’s index value indicates good flow properties?
- a) Less than 10%
- b) 20-30%
- c) Greater than 30%
- d) Greater than 50%
- What is the significance of bulkiness in powders?
- a) It affects the color of the powder
- b) It influences the volume occupied by a unit weight of the powder
- c) It changes the taste of the powder
- d) It determines the odor of the powder
- What is the angle of repose?
- a) The angle formed by a powder when poured onto a flat surface
- b) The angle of the largest particle in the powder
- c) The angle at which a powder becomes liquid
- d) The angle of the smallest particle in the powder
- Which property is critical for the compaction behavior of powders in tablet formulation?
- a) Particle color
- b) Particle size distribution
- c) Particle porosity
- d) Particle shape
- What is the primary goal of particle size reduction in pharmaceutical processes?
- a) To enhance the solubility and dissolution rate of drugs
- b) To change the color of particles
- c) To increase the odor of particles
- d) To reduce the density of particles
- Which property of powders is assessed using a permeameter?
- a) Color
- b) Size
- c) Permeability
- d) Solubility
- What is the relationship between particle size and specific surface area?
- a) Larger particles have greater specific surface area
- b) Smaller particles have greater specific surface area
- c) Particle size does not affect specific surface area
- d) Specific surface area is only influenced by particle color
- Why is specific surface area important for catalytic activity?
- a) It affects the color of the catalyst
- b) It provides more active sites for reactions to occur
- c) It changes the odor of the catalyst
- d) It influences the density of the catalyst
- Which method is commonly used to determine the specific surface area of porous materials?
- a) BET (Brunauer-Emmett-Teller) method
- b) Laser diffraction
- c) Microscopy
- d) Spectrophotometry
- What is the significance of adsorption isotherms in particle analysis?
- a) They provide information about the color of particles
- b) They describe the relationship between the amount of adsorbate and pressure at constant temperature
- c) They measure the size of particles
- d) They indicate the chemical composition of particles
- Which factor can influence the specific surface area of a material?
- a) Particle shape
- b) Particle size
- c) Particle porosity
- d) All of the above
- What is the role of particle shape in the compaction behavior of powders?
- a) It affects the color of the compacted material
- b) It influences the density and mechanical strength of the compact
- c) It changes the taste of the compacted material
- d) It determines the solubility of the compacted material
- What is the impact of high specific surface area on the dissolution rate of drugs?
- a) It decreases the dissolution rate
- b) It increases the dissolution rate
- c) It has no effect on the dissolution rate
- d) It changes the color of the drug
- Which technique provides information about both particle size and specific surface area?
- a) BET method
- b) Laser diffraction
- c) Dynamic light scattering
- d) Microscopy
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