Questions

Fog will form if the air temperature drops below the dew point, which is the capacity of the air to hold moisture in suspension. If the temperature drop far enough the moisture content will exceed saturation point, causing it to form visible water vapour.

It happens in the early mornings or late after noons.

Aluminium being a good conductor of heat conducts away the heat from the substance quite easily and causes quick freezing.

The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN). 

Refer National symbols

Arena is the special name for playground of Wrestling.

∆Tf = kf.m 

for ethylene glycol in aq. solution

 $$\begin{gathered} ∆Tf = kf wmol.wt × 1000wt. of solvent \\ 6 = 1.86 x w x 100062 x 4000 \end{gathered}$$

=> w = 800 g

So, the weight of solute should be more than 800 g.