Which among the following is a negatively charged sol?

How many of the following statements are correct $:$
$(i)$ When freshly prepared precipitate are converted into colloidal solution then process is called peptization.
$(ii)$ Lyophilic sol are mostly of inorganic nature.
$(iii)$ Lyophilic sol are highly solvated as particles have great affinity for solvent.
$(iv)$ Lyophobic sols are reversible sols so special methods are required to prepare them.

The coagulation value is expressed in the units of ..............

In an electrophoresis setup,a colloidal solution of glycine having a $pH$ of $5.97$ is kept at constant $T$ and $P$. What will happen if a few drops of base are added to it?

The protecting power of lyophilic colloidal sol is expressed in terms of

What improvement can you suggest in the Hardy-Schulze rule?