The cation that will not be precipitated by H _2 S in the presence of dil HCl is:

JEE Main 2015 Chemistry question

The cation that will not be precipitated by in the presence of dil HCl is:

(1)Correct
(2)
(3)
(4)

Answer: (1)

Solution

In qualitative analysis, dilute HCl suppresses the ionisation of by the common-ion effect, keeping the sulphide-ion concentration very low. Only the group II cations — whose sulphides have extremely small solubility products — precipitate under these conditions: ,

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Question ID VK-115274