1.

H_(2)S in the presence of HCIprecipitates group IIradicalsbut not of the group IV because

Answer»

HCI ACTIVATE `H_(2)S`
HCIincreses cone of `CI^(THETA)` dueto commonion effect
HCIdecreses cone of `S^(2-)` dueto commonion effect
HCI LOWERS the solubility of `H_(2)S`in soin

Answer :c


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