Emulsions are normally prepared by shaking the two components together vigorously although some ...

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Emulsions are normally prepared by shaking the two components together vigorously although some kind of emulsifying agent usually has to added to stabilize the product. This emulsifying agent may be a soap or other surfactant (surface active) species or a lyophilic sol that forms a protective film around the dispersed phase.
Emulsions broadly classified into two types :
(i) Oil in water emulsions \( (\mathrm{O} / \mathrm{W}) \) : Oil acts as dispersed phase and water acts as dispersion medium.
(ii) Water in oil emulsions (W/O) : Water acts as dispersed phase and oil acts as dispersion medium. Dye test, dilution test may be employed for identification of emulsions.
Select correct statement:
(a) Water in oil emulsions are less viscous than the aqueous emulsions
(b) Electrical conductance of aqueous emulsions is less than that of oil emulsions
(c) Deemulsification can be done by soap or detergent
(d) An emulsion can be diluted with \( \mathrm{H}_{2} \mathrm{O} \) then it is oil in water (O/W) type
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