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A certain compound (X) is used in labora...

A certain compound (X) is used in laboratory for analysis. Its aqueous solution gave the following reactions :
(i) On adding to `CuSO_(4)` solution, a brown ppt. is obtained which turns white on addition of excess of `Na_(2)S_(2)O_(3)` solution.
(ii) On addition to `Ag^(+)` ion solution, a yellow curdy ppt. is obtained which is insoluble in `NH_(4)OH.` Identify (X), give equations for the reactions at step (i) and (ii).

Text Solution

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Kl
`2CuSO_(4)+4kltoCu_(2)l_(2)darr+l_(2)+2k_(2)SO_(4)`
(i)`l_(2)+2Na_(2)S_(2)O_(3)to2Nal+Na_(2)S_(4)O_(6)`
(ii)`Ag+ltoAgldarr`
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