Question

A white precipitate is obtained with sodium hydroxide solution from the following salts is:

• A. lead $\left(P{b}^{2+}\right)$ salt
• B. ferrous $\left(F{e}^{2+}\right)$ salt
• C. zinc $\left(Z{n}^{2+}\right)$ salt
• D. calcium $\left(C{a}^{2+}\right)$ salt

Answer 1

Answer: (A), (C), (D)

The correct options are
A lead $\left(P{b}^{2+}\right)$ salt
C zinc $\left(Z{n}^{2+}\right)$ salt
D calcium $\left(C{a}^{2+}\right)$ salt

Lead $\left(P{b}^{2+}\right)$ salt, Zinc $\left(Z{n}^{2+}\right)$ salt and Calcium $\left(C{a}^{2+}\right)$ salt give white precipitate of $Pb(OH{)}_2,Zn(OH{)}_2$ and $Ca(OH{)}_2$ respectively.