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Aqueous hypo solution on reaction with a...

Aqueous hypo solution on reaction with aqueous `AgNO_(3)` gives :

A

yellow precipitate changing to black

B

white precipitate changing to black

C

orange precipitate to blue

D

no precipitate

Text Solution

Verified by Experts

The correct Answer is:
B
`S_(2)O_(3)^(2-)+2Ag^(+) to Ag_(2)S_(2)O_(3)darr(white)`" , "`Ag_(2)S_(2)O_(3)+H_(2)O to Ag_(2)S darr(black)+H_(2)SO_(4)`
This hydrolytic decompostion can be accelerated by warming.
If hypo is in excess, then soluble complex is formed.
`2S_(2)O_(3)^(2-)+Ag to [Ag(S_(2)O_(3))_(2)]^(3-)` (soluble complex) `[Ag(S_(2)O_(3))_(3)]^(5-)`
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