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A student was given a sample of colourle...

A student was given a sample of colourless solution containing three cations and was asked to identify the cations. Student carried out a series of reactions as given below.
Precipitates `'A','B'` and `'C'` are respectively:

A

`Al(OH)_(3),BaSO_(4)` and `AgCl`

B

`AgCl, BaSO_(4)` and `Zn(OH)_(2)`

C

`AgCl, Ca(OH)_(2)` and `ZnSO_(4)`

D

`ZnCl_(2), BaSO_(4)` and `Al(OH)_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B

`Ag^(+)+Cl^(-)toAgCldarr("white"),3AgCl+Na_(3)AsO_(3)toAg_(3)AsO_(3)darr("yellow")+3NaCl`
`Ba^(2+)+SO_(4)^(2)toBaSO_(4)darr("white"),Ba^(2+)`salts give apple green colour to the Bunsen flame.
`Zn^(2+)+2NH_(3)+2H_(2)O toZn(OH)_(2) darr ("white")+2NH_(4)uarr`
`Zn(OH)_(2)darr +4NH_(4) hArr [Zn(NH_(3))_(4)]^(2+)+2OH^(-)`
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