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

`H_(2)S` gas when passed through 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

sulphides of group IV cations are unstable in HCl

C

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

D

presence of HCl increase the sulphide ion concentration

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The correct Answer is:
A
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