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  4. Addition of sodium thiosulphate solution to a solution of silver nitrate gives X as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give Y. On boiling in water, Y gives Z . X, Y and Z respectively are

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Q. Addition of sodium thiosulphate solution to a solution of silver nitrate gives $X$ as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give $Y$. On boiling in water, $Y$ gives $Z . X, Y$ and $Z$ respectively are

WBJEEWBJEE 2015The d-and f-Block Elements

Solution:

The sequence of reactions are
image
Hence, $X = Ag _{2} S _{2} O _{3}$
$Y = Na _{3}\left[ Ag \left( S _{2} O _{3}\right)_{2}\right] Z= Ag _{2} S$