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H(2)S gas when passed through a solution...

`H_(2)S` gas when passed through a solution of cations containing `HCl` precipitates the cations of second group in qualitative analysis but not those belonging to the fourth group. It is because

A

Presence of HCl decreases the sulphide ion concentration

B

Sulphide of group II are unstable in HCl

C

Solubility product of group II sulphides is more than that of group IV sulphides

D

Presence of HCl increases the sulphide ion concentration.

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A
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