In the following reaction sequence in aqueous solution, the species X, Y and Z, respectively, are: S2O2−3Ag+−−→XclearsolutionAg+−−→Ywhiteprecipitatewith time−−−−−→Zblackprecipitate
A
[Ag(S2O3)2]3−,Ag2S2O3,Ag2S
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B
[Ag(S2O3)3]5−,Ag3SO3,Ag2S
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C
[Ag(SO3)z]3−,Ag2S2O3,Ag
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D
[Ag(SO3)3]3−,Ag2SO4,Ag
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Solution
The correct option is A[Ag(S2O3)2]3−,Ag2S2O3,Ag2S Ag++2S2O2−3⟶[Ag(S2O3)2]3−(X)Ag+−−→Ag2S2O3(↓)white ppt. (Y)(with time)−−−−−−→Ag2S(↓)Black(Z)