1.

When excess of sodium thiosulphate is added to dil AgNO_3 solution a soluble compound X is formed . However when dil .Na_2S_2O_3 solution is added to cone AgNO_3 solution a white ppt turning yellow and finally black ppt of Y is obtained . Which is correct pair :

Answer»

X is `Ag_2S` and Y is `Na_3[AG(S_2O_3)_2]`
X is `Na_3[Ag(S_2O_3)_2]` and Y is `Ag_2S`
X is `Ag_2S_2O_3` and Y is `Ag_2S`
X is `Ag_2S_2O_3` and Y is `Na_3[(S_2O_3)_2]`

ANSWER :B


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