If group-III is absent, pass \( \mathrm{H}_{2} \mathrm{~S} \) gas i...

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If group-III is absent, pass \( \mathrm{H}_{2} \mathrm{~S} \) gas in the solution
P of group-III for a few minutes. If a precipitate

W appears of flesh coloured it indicates-
(1) \( \mathrm{Ni}^{2+} \)
(2) \( \mathrm{Co}^{2+} \)
(3) \( \mathrm{Mn}^{2+} \)
(4) \( \mathrm{Zn}^{2+} \)
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