On adding `AgNO_(3)` solution into KI solution, a negatively charge colloidal sol is obtained when they are in :

Options

A. 100 mL of `0.1 M AgNO_(3)+100 mL` of 0.1 M KI
B. 100 mL of `0.1 M AgNO_(3)+50 mL` of 0.2 M KI
C. 100 mL of `0.1 M AgNO_(3)+100 mL` of 0.1 M KI
D. 100 mL of `0.1 M AgNO_(3)+100 mL` of 0.15 M KI

Answer

D

Explanation

`AgNO_(3)+KI rarr AgI+KNO_(3)`
if milli moles of `KI gt AgNO_(3)` , negatively charge colloidal is formed.