Three separate samples of a solution of a single salt gave these re...

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Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess
P ammonia solution, one formed a white precipitate with
W dilute \( \mathrm{NaCl} \) solution and one formed a black precipitate with \( \mathrm{H}_{2} \mathrm{~S} \). The salt could be :
(a) \( \mathrm{AgNO}_{3} \)
(b) \( \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} \)
(c) \( \mathrm{Hg}\left(\mathrm{NO}_{3}\right)_{2} \)
(d) \( \mathrm{Mn}\left(\mathrm{NO}_{3}\right)_{2} \)
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