Monday, May 10, 2010

Colloids and Emulsions

Multiple Choice Questions (MCQs) from Colloids and Emulsions in Pharmacy
16.    An emulsion in which water globules are dispersed within the oil globules so that the system may be designated as ..................................                                
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17.    medically used emulsions for oral administration are usually ...............type:

a)o/w        
b) w/o 
c) w/o/w        
d) o/w/o                             
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18.    The surface active agents used in multiple emulsions are:

a) non-ionic  
b) synthetic      
c) ionic    
d) natural      
e ) a&b   
f) c&d                             
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19.    Gelatin and Tragacanth are :

a) emulsifying agents    
b) surface active agents  
c) synthetic non-ionic     
d) b&c       
e) a&c                             
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20.    W/O  emulsions are used almost exclusively for....................... applications :

a) internal      
b) external       
c) causal                      
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21.    Calcium palmitate , spans , cholesterol and wool fat  are emulsifiers used in the preparation of :       

a) w/o  
b) o/w 
c) w/o/w      
d) o/w/o                            
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22.    Dye solubility test is mostly used for ..................of the emulsion type.  
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23.    Mostly used dye in the dye solubility test is .......................................                 
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24.    At commercial level,………………………..is used for dilution method of determination of the emulsion thpe.        

a) ether   
b) alcohol       
c) water     
d) choloroform                   
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25.    During conduction method ,the electrical circut completes when continuous phase is ......................                     
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26.    Co lour of the o/w  emulsion is usually...................................             
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27.    Initially o/w emusion feels ................................on the skin.                  
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28.    When we add oil soluble dye in the o/w emulsion, the colored phase will be ……………….                       
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29.    The British chemist Thomas Graham applied the term “colloid” to : 

a)polypeptides  
b) polysaccharides
c) flavones   
d) a&b                               
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30.    Colloidal dispersions are distinguished form the solutions and coarse dispersions on the basis of the :

a) viscosity   
b) density    
c) particle size                            
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31.    Most of the pharmaceutical systems are prepared in the form of the :

a) hydrophilic colloidal system       
b) lipophilic colloidal system                         
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32.    Radioactive colloids are being used as diagnostic & ……………….. Purposes in nuclear medicines.                         
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33.    micelles, microemulsions,liposomes, parenteral emulsions ,micro spheres ,nanoparticles are known as ……………………
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