A solution of a colourless salt when aci...

A solution of a colourless salt when acidified with dil. HCl , slowly turns milky with a pale yellow tint. When `AgNO_(3)` solution is added to the solution of the salt, white ppt. slowly changing to yellow, orange, brown and finaly to black is obtained. the anion present in the salt is

`Br^(-)`

`SO_(3)^(2-)`

`S_(2)O_(3)^(2-)`

`I^(-)`

Text Solution

Verified by Experts

`Na_(2)S_(2)O_(3) +2HCl to 2NaCl +underset("Colloidal") (SO_2 uarr)+S +H_(2)O`
`Na_(2)S_(2)O_(3)+AgNO_(3) to underset("White ppt.")(2Ag_(2)S_(2)O_(3))+2NaNO_(3)`
`AgS_(2)O_(3)` slowly changes to black .`Ag_(2)S`

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To solution of a salt in acid medium AgNO_(3) is added a white ppts repidly changing to yellow orange , brown and finaly is obtained .This isd due to the presence of

`SO_(3)^(2-)`

`S_(2)O_(3)^(2-)`

`CH_(3)COO^(Theta)`

`S_(2)^(Theta)`

A solution of salt in HCl when diluted with excess of water turns milky. It indicates the presence of

`Al`

`Bi`

`Sb`

`Zn`

If silver nitrate solution is added to a salt solution and a yellow precipitate is obtained the salt may contain

`Br^(-)`

`l^(-)`

`Cl^(-)`

`F^(-)`