QJEEM21Ch81f2: JEE Main 2021 Chemistry - Class 12 JEEM21Ch81f2 Solution: 100 ml of 0.0018% (w/v) solution of Cl ion was the minimum…

Coagulation value The minimum concentration of electrolyte in millimoles required to cause coagulation of 1 L of colloidal solution.

Given, 0.0018 g Cl ^$-$ present in 100 mL solution

Coagulation value of Cl ^$-$ is $= {{{{0.0018} \over {35.5}} \times {{10}^3}} \over {0.1}} = 0.5070 \simeq 1$