List of top Physical Pharmacy Questions on Dispersion systems asked in GPAT

Which of the following protective colloids has high gold number:

Suspensions containing a high percentage (about 50% or greater) of small, deflocculated particles would show which of the following flow properties?

Match the following List I with List II with respect to most specific Activity / Property in formulation of disperse system

	List I Formulation Ingredient		List II Activity / Property
	Salts of d-glu- curonic acid poly-peptides and amino acids		Are pseudoplastic and plastic in nature
	Surfactants, both ionic and non-ionic		Form a multimolecular film around the dispersed droplets of oil in an o/w emulsion
	Magnesium aluminium silicate		Emulsifier belonging to the class of solid particles forms w/o emulsions
	Structured vehicles		Emulsifier belonging to the class of solid particles and forms o/w emulsion
			Have been used to bring about flocculation of suspended particles

Choose the correct answer from the options given below:

Which among the following drugs on standing in aqueous solution can dimerize to 2,5- bis(aminoxy-methyl) 3,6-diketopiperazine?

Increasing the proportion of the disperse phase of an emulsion by more than 60% may lead to:

Roll-tube technique is the modification of :

The preferred rheological behavior of Pharmaceutical suspensions is that of

Colloidal depression have which type of rheology

Which of the following is an irreversible phenomenonralated to stability of emulsion