Q. Which one of the following will dissolve in water most readily?
A) $I_{2}$
B) $BaCO_{3}$
C) $KF$
D) $PbI_{2}$
Explanation
(c)
All the alkali halides except lithium fluoride are freely soluble in water. $I_{2}$ (non-polar) is least soluble in water. Group IIA carbonates $\left( BaCO_{3} \right)$ are insoluble in water. $PbI_{2}$ is sparingly soluble in cold water but quite soluble in hot water. KF (most polar) is most readily soluble in water.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.