Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject physical pharmaceutics II. Read following article for your reference.
Flow Properties Of Powders » PHARMACAREERS
- What is meant by the flow properties of powders?
- a) The color of the powder
- b) The ability of powder particles to move and flow
- c) The taste of the powder
- d) The smell of the powder
- Which property of powders affects their flowability?
- a) Particle size
- b) Particle shape
- c) Moisture content
- d) All of the above
- What is the angle of repose?
- a) The angle formed by a pile of powder when it is poured onto a flat surface
- b) The angle at which a powder melts
- c) The angle of the smallest particle in the powder
- d) The angle of the largest particle in the powder
- 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 Hausner ratio value indicates poor flow properties?
- a) Less than 1
- b) Greater than 1.25
- c) Equal to 1
- d) Greater than 2
- What is 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 does porosity refer to in the context of powders?
- a) The density of the powder
- b) The proportion of void space in a bulk powder
- c) The shape of individual particles
- d) The temperature of the powder
- Why is particle size important for powder flow properties?
- a) Larger particles generally flow better than smaller particles
- b) Smaller particles generally flow better than larger particles
- c) Particle size has no effect on flow properties
- d) Flow properties are only influenced by particle color
- What is the significance of moisture content in powder flow properties?
- a) Higher moisture content generally improves flowability
- b) Higher moisture content generally reduces flowability
- c) Moisture content has no effect on flowability
- d) Moisture content only affects the color of the powder
- Which method is used to measure the flowability of powders?
- a) Angle of repose
- b) Spectrophotometry
- c) Gas chromatography
- d) Colorimetry
- 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
- What is the effect of particle shape on the packing density of powders?
- a) Irregular shapes result in higher packing density
- b) Spherical shapes result in higher packing density
- c) Particle shape does not affect packing density
- d) Packing density is only influenced by particle color
- Why is it important to determine the permeability of granular materials?
- a) To assess their flow properties
- b) To evaluate their chemical reactivity
- c) To determine their color
- d) To measure their solubility
- Which method measures the specific surface area based on gas adsorption-desorption isotherms?
- a) Laser diffraction
- b) BET (Brunauer-Emmett-Teller) method
- c) Dynamic light scattering
- d) Microscopy
- What is the significance of particle size distribution in powder flow properties?
- a) A narrow distribution improves flowability
- b) A wide distribution improves flowability
- c) Particle size distribution has no effect on flowability
- d) Distribution affects only the color of the powder
- Which property is measured by gas adsorption techniques?
- a) Particle color
- b) Particle size
- c) Specific surface area
- d) Particle density
- What is the role of lubricants in improving powder flow properties?
- a) To increase particle size
- b) To reduce friction between particles
- c) To change the color of the powder
- d) To increase particle density
- Why is it important to assess the flow properties of powders in tablet formulation?
- a) To ensure uniform filling of tablet dies
- b) To change the color of the tablets
- c) To enhance the taste of the tablets
- d) To increase the density of the tablets
- Which instrument is commonly used to measure the flow rate of powders?
- a) Flow meter
- b) Viscometer
- c) Pycnometer
- d) Micrometer
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