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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

A

`Br^(-)`

B

`SO_(3)^(2-)`

C

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

D

`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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Knowledge Check

  • 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

    A
    `SO_(3)^(2-)`
    B
    `S_(2)O_(3)^(2-)`
    C
    `CH_(3)COO^(Theta)`
    D
    `S_(2)^(Theta)`

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

    A
    `Al`
    B
    `Bi`
    C
    `Sb`
    D
    `Zn`

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

    A
    `Br^(-)`
    B
    `l^(-)`
    C
    `Cl^(-)`
    D
    `F^(-)`
    • DINESH PUBLICATION-PRINCIPLES RELATED TO PRACTICAL CHEMISTRY-Brain teasers-32
    1. A solution of a colourless salt when acidified with dil. HCl , slowly ...

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