Question

In presence of $HCl,H_{2}S$ results the precipitation of group-2 elements but not group-4 elements during qualitative analysis. It is due to :

• A. higher concentration of $S^{2-}$
• B. higher concentration of $H^{+}$
• C. lower concentration of $S^{2-}$
• D. lower concentration of $H^{+}$

Answer 1

The correct option is C lower concentration of $S^{2-}$

In presence of $HCl,H_{2}S$ results the precipitation of group-2 elements but not group-4 elements due to lower concentration of $S^{2-}$ ion.