Browse Questions

# Which of the following is not precipitated as sulphide by passing $H_2S$ in the presence of conc. HCl?

(a) Copper
(b) Arsenic

Solubility product of CdS is greater than the other sulphides of group II, it is therefore precipitated only on dilution and cannot be precipitated in conc. HCl.
edited Jan 29, 2014