One desires to prepare a positively charged sol of silver iodide. This can be achieved by:

Options

A. Adding a little `Ag_3^(4)` solution to KI solution in slight excess
B. Adding a little KI solution to `Ag_3^(4)` solution in slight excess
C. Mixing equal volumes of equimolar solution of `Ag_3^(4)` and KI
D. None of these

Explanation

To prepare a positively charged sol of silver iodide (AgI), we can follow these steps:

### Step-by-Step Solution:

1. **Prepare the Solutions**: Start by preparing two solutions: one of silver nitrate (AgNO3) and another of potassium iodide (KI).

2. **Mix the Solutions**: Slowly add the KI solution to the AgNO3 solution while stirring. This will lead to the formation of a precipitate of silver iodide (AgI).

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