Three types of contamination are: or. 1  Microbial Contamination. 2  Cross Contamination. 3  Partical Contamination. 4  Contamination-this is when food contains a forgien object. 5  Cross Contamination-this is when harmful bacteria or virus are passed from one food to another.hree types of contamination are: or. 1  Microbial Contamination. 2  Cross Contamination. 3  Partical Contamination. 4  Contamination-this is when food contains a forgien object. 5  Cross Contamination-this is when harmful bacteria or virus are passed from one food to another.
The freezing point of the solvent in a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution). Non-Volatile Solutes. The freezing point of the solvent in a solution will be less than the freezing point of the pure solvent whether the solution contains a non-volatile solute or a volatile solute. However, for simplicity, only non-volatile solutes will be considered here.
However, the magnitude of the freezing point depression is larger than the boiling point elevation for the same solvent and the same concentration of a solute. Because of these two phenomena, the liquid range of a solvent is increased in the presence of a solute.