Question

The least volatile fraction of air is??

Answer 1

fractional distillation is the separation of a mixture into its components parts, or fractios, separating chemical compounds
by their boiling point by heating them to a temperature at which one or more fraction of the compound will vapourize .
it use distillation to fractionate . generally
the component parts have boiling points
that differ by less than 25 degree Celsius
from each other under a pressure of one
atmosphere. if the difference in boiling
point is greater than 25 degree Celsius,
a simple distillation is typically used