1.

Aqueous hypo solution on reaction with aqueous `AgNO_(3)` gives :A. yellow precipitate changing to blackB. white precipitate changing to blackC. orange precipitate to blueD. no precipitate

Answer» Correct Answer - 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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