Fog is a colloidal system of

Provide information about the colligative properties and the color of colloidal solutions.

The emulsifying agent in milk is

When $FeCl_3$ is added to an excess of hot water,it gives a sol '$X$'. When $FeCl_3$ is added to $NaOH_{(aq)}$ solution,it gives a sol '$Y$'. The sols '$X$' and '$Y$' formed in the above processes respectively are:

The purple of Cassius is due to the presence of $......$.

Which of the following is an incorrect statement?