Q. Which of the following is the most effective in the coagulation of gold sol?
A) ${NaNO}_{3}$
B) ${MgCl}_{2}$
C) ${Na}_{3}{PO}_{4}$
D) $K_{4}\left\lbrack Fe(CN)_{6} \right\rbrack$
Explanation
(b)
Among ${Na}^{+},\ K^{+},\ {Mg}^{2 +},\ ions,\ {Mg}^{2 +}$ ion has maximum valency, thus it will be the most effective in the coagulation of gold sol
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.