Q.
Which of the following ions will finally give a black precipitate with Ag⊕ ion?
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a
SO32−
b
BrΘ
c
CrO42−
d
S2O32−
answer is D.
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Detailed Solution
2Ag⊕ +S2O32−⟶Ag2S2O3⟶H2O (White ppt.) Ag2S+H2SO4 (Black ppt)
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