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In the presence of HCl, H2S results the ...

In the presence of `HCl, H_2S `results the precipitation of group-2 elements but no group-4 elements during qualitative analysis. It is due to:

A

higher concentration of `S^(-2)`

B

higher concentration to `H^+`

C

lower concentration of `S^(-2) H^+`

D

lower concentration of `H^+`

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