Question

Which reagent is used to remove $S{O}_4^{2-}$ or $C{l}^{-}$ from water?

• A. $NaOH$
• B. $Pb{\left(N{O}_3\right)}_2$
• C. $BaS{O}_4$
• D. $KOH$

Answer 1

The correct option is B $Pb{\left(N{O}_3\right)}_2$

Option (B) is correct.
$Pb{\left(N{O}_3\right)}_2$ is used to remove $S{O}_4^{2-}$ or $C{l}^{-}$ from water.
$PbS{O}_4$ and $PbC{l}_2$ are insoluble in cold water.