Question

Which of the following salts is insoluble in water at room temperature but soluble in boiling water.

• A. $CaCl_{2}$
• B. $BaCl_{2}$
• C. $SrCl_{2}$
• D. $PbCl_{2}$

Answer 1

Answer: (D)

$PbCl_{2}$

Answer 2

Due to the inert pair effect.