0
The depression of the freezing point is dependent on the nature of solvent and concentration of solute.
The answer is "Freezing point depression" on Apex
freezing point depression ..
The freezing point depression constant for Naphthalene is 6.9 degrees Celsius/mhttp://en.wikipedia.org/wiki/Freezing-point_depression
f.p depression = (freezing point of pure solvent)-(freezing point of solution)
-------> 178.4-166.2=12.2