# In the preparation of AgI sol, the excess of $AgNO_3$ is added to potassium iodide solution. The particles of the sol will acquire

(a) negative charge

(b) positive exharge

(c) no charge

(d) unpredictable

AgI colloidal particles adsorb common ion $Ag^+$ from excess $AgNO_3$ solution and acquires positive charge.