Question

Gold sol is an electronegative sol. The amount of electrolyte required to coagulate a certain amount of gold sol is minimum in the case of.

• A. $\mathrm { CaCl } _ { 2 }$
• B. NaCl
• C. $\mathrm { AlCl } _ { 3 }$
• D. $\mathrm { Na } _ { 2 } \mathrm { SO } _ { 4 }$

Answer 1

Answer: (C)

$\mathrm { AlCl } _ { 3 }$

Answer 2

Coagulation is governed by Hardy Schulze rule.