Q. Among the electrolytes ${Na}_{2}{SO}_{4},\ {CaCl}_{2},\ {Al}_{2}\left( {SO}_{4} \right)_{3}and\ {NH}_{4}Cl,\$the most effective coagulation agent for ${Sb}_{2}S_{3}$ sol is
A) ${Na}_{2}{SO}_{4}$
B) ${CaCl}_{2}$
C) ${Al}_{2}\left( {SO}_{4} \right)_{3}$
D) ${NH}_{4}Cl$
Explanation
(c)
${Sb}_{2}S_{3}$is an anionic sol, therefore cation of highest valency (${Al}^{3 +}$in the present case) would be most effective coagulating agent.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.