Question

H₂S gas when passed through a solution of
cations containing HCl precipitates the
cations of second group of qualitative
analysis but not those belonging to the fourth
group. It is because
(a) presence of HCl decreases the sulphide ion concentration.
(b) solubility product of group II sulphides
is more than that of group IV sulphides.
(c) presence of HCl increases the sulphide ion concentration.
(d) sulphides of group IV cations are unstable in HCl.

Answer 1

Answer:

(a) the presence of HCL decreases the sulphide ion concentration is the answer