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Nitrates

Addition of s...

Question

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 :

A g_{2} S_{2} O_{3}, N a_{3} [A g (S_{2} O_{3})_{2}], A g_{2} S

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A g_{2} S O_{4}, N a [A g (S_{2} O_{3})_{2}], A g_{2} S_{2}

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A g_{2} S_{2} O_{3}, N a_{5} [A g (S_{2} O_{3})_{3}], A g S

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A g_{2} S O_{3}, N a_{3} [A g (S_{2} O_{3})_{2}], A g_{2} O

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Solution

The correct option is A $A g_{2} S_{2} O_{3}, N a_{3} [A g (S_{2} O_{3})_{2}], A g_{2} S$
The addition of sodium thiosulphate solution to a solution of silver nitrate gives 'X' as a 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:

$A g_{2} S_{2} O_{3}, N a_{3} [A g (S_{2} O_{3})_{2}]$ and $A g_{2} S$ respectively.
$N a_{2} S_{2} O_{3} 2 A g N O_{3} - ---- \to A g_{2} S_{2} O_{3} X$
$A g_{2} S_{2} O_{3} X N a_{2} S_{2} O_{3} (e x c e s s) - --------- \to N a_{3} [A g (S_{2} O_{3})_{2}] Y$
$N a_{3} [A g (S_{2} O_{3})_{2}] Y w a t e r - -- \to b o i l A g_{2} S Z$

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