Q. Which mixture of the solutions will lead to the formation of negatively charged colloidal $[AgI]I^-$ sol. ?
A) 50 mL of 1M $AgNO_3$ + 50 mL of 1.5 M KI
B) 50 mL of 1M $AgNO_3$ + 50 mL of 2 M KI
C) 50 mL of 2 M $AgNO_3$ + 50 mL of 1.5 M KI
D) 50 mL of 0.1 M $AgNO_3$ + 50 mL of 0.1 M KI
Explanation
[Solution] A negative $AgI/I^-$ sol forms when KI is in excess; KI is in excess in both (1) and (2), so the source key accepts both options. Answer (1) / (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.