What is the result when soap is used in hard water?

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 process of converting a precipitate into a colloidal solution is known as:

The purple color of Cassius purple is due to:

Which of the following does not show Tyndall effect?

Which of the following statements is true for a lyophilic sol?