In the absence of anything else, the live and neutral wires are exactly the same. Both carry current. You need a circuit, and that means a circle. The two wires form a circle, and in that circle is the power supply (usually a transformer on a pole or in a green case on the street) your load, and probably a switch. The two wires are just the two parts of a circle or loop at any given point.
Reflux is a distillation technique involving the condensation of vapors and the return of this condensate to the system from which it originated.he more reflux provided for a given number of theoretical plates, the better is the column's separation of lower boiling materials from higher boiling materials. Conversely, for a given desired separation, the more reflux is provided, the fewer theoretical plates are required.
Both refluxing and distillation involve boiling of a solution. Stirring makes the solution boil more smoothly without becoming superheated. Without stirring, a liquid heated in a container can become superheated and release vapour suddenly, sometimes violently. This sudden bubble of gas can cause the solution and reagents to be thrown through the condensor, which is potentially dangerous, and can ruin the distillation.