Question

Colloidal solution of arsenious sulphide is coagulated by.

• A. Addition of electrolyte
• B. Addition of non-electrolyte
• C. Addition of solid $A s _ { 2 } S _ { 3 }$
• D. None of these

Answer 1

Answer: (A)

Addition of electrolyte

Answer 2

$A s _ { 2 } S _ { 3 }$ is coagulated by addition of electrolyte due to opposite charge.