Question

Which one of the following systems has the smallest sized domains is in the dispersed phase.
$A)$ Nanoemulsion
$B)$ Coarse suspension
$C)$ Coarse emulsion
$D)$ Microemulsion

Answer 1

Hint: Microemulsions are clear, thermodynamically stable isotropic fluid combinations of oil, water, and surfactant, regularly in the mix with a co-surfactant.

Complete step by step answer:
We know that the micro means ${10^{ - 6}}$and the normal measurement of drops in full scale emulsion is near $1mm$. Furthermore, emulsion suggests that drops of the dispersed phase have diameter near ${10^{ - 3}}$.
So the micro emulsion indicates that the size will be ${10^{ - 6}} \times {10^{ - 3}} = {10^{ - 9}}$.

So, Correct option is $D)$.

Additional Information:
- With a wide range of microemulsions, water–oil-water type microemulsion offers remarkable benefits. Like, Microemulsion-based definitions are set up in fluid structures, which are ideal for patients with troubles in gulping solids.
- The watery stage may contain salt or potentially different fixings, and the oil may really be an unpredictable combination of various hydrocarbons. Microemulsions have numerous financially significant employment Water-in-oil microemulsions for some laundry measures, cleaning of oil-contaminated drill cuttings, Floor polishers, and cleaners, other cleaning applications, Pesticide plans, Cutting oils , Drugs.
-Microemulsions additionally have mechanical applications, one of them being the amalgamation of polymers. Microemulsion polymerization is a complex heterogeneous interaction where transport of monomers, free revolutionaries, and different species, (for example, chain move specialists, co-surfactant, and inhibitors) between the watery and natural stages, takes place.

Note:
The size estimation doesn't uncover whether a system is a micro or nanoemulsion, the definition of a framework characterizes it. you can have a microemulsion with 150 nm size and furthermore a nanoemulsion with a similar size range.