For the confirmatory test of sulphide ion a piece of \( \mathrm{P} ...

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For the confirmatory test of sulphide ion a piece of
\( \mathrm{P} \)
filter paper dipped in lead acetate solution turns black
W
on exposure to the \( \left(\mathrm{H}_{2} \mathrm{~S}\right) \) gas due to the formation of-
(1) Lead Carbonate
(2) Lead Nitrate
(3) Lead Acetate
(4) Lead Sulphide
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