An example of a water-in-oil $(W/O)$ type emulsion is ......

Which of the following is an incorrect statement?

According to the Hardy-Schulze rule,the flocculating power of an ion increases with:

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 charges on the colloidal $CdS$ sol and $TiO_2$ sol are,respectively :

What type of solutions are formed on dissolving different concentrations of soap in water?