When dilute aqueous solution of \(KI\) (excess) is added to \(AgNO_3\) solution, the charge on the \(AgI\) colloidal, particles formed will be:

Negative

The correct answer is option 2. Negative.

When silver iodide (\(AgI\)) colloidal particles form in a solution, they exhibit a surface charge due to the adsorption of ions. In this case, \(AgI\) is primarily composed of iodide ions (\(I^-\)) and silver ions (\(Ag^+\)).

When \(AgI\) colloidal particles form, the surface tends to be enriched with iodide ions (\(I^-\)). These iodide ions are negatively charged. The reason for this preference is due to the nature of the \(AgI\) surface, which favors the adsorption of negatively charged ions.

As a result, the colloidal particles of \(AgI\) will carry a net negative charge on their surface due to the adsorption of \(I^-\) ions. This charge allows the colloidal particles to repel each other, preventing them from coagulating and keeping them dispersed in the solution.

So, in summary, the \(AgI\) colloidal particles formed in this reaction will carry a negative charge due to the adsorption of \(I^-\) ions onto their surface.