Solubility of AgCl is minimum in
0.01 M KCl
0.01 M MgCl2
H2O
0.01 M AgNO3
Solubility of any sparingly soluble salt decreases with the increase in common ion concentration.
Common ion concentration;
1Cl−=0.01×1=0.01 M2Cl−=0.01×2=0.02 M(3) Zero4Ag+=0.01×1=0.01 M