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An unknown mixture contains one or two o...

An unknown mixture contains one or two of the following: `CaCO_(3),BaCl_(2),AgNO_(3),Na_(2)SO_(4),ZnSO_(4) and NaOH`. The mixture is completely soluble in water and solution gives pink colour with phenolphthalein. When dilute hydrochloric acid is gradually added to the solution, a precipitate is formed which dissolved with further addition of the acid.
Q. The white precipitate is

A

`ZnSO_(4)`

B

`Zn_(2)ZnO_(2)`

C

`Zn(OH)_(2)`

D

`ZnCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Mixture contains `NaOH+ZnSO_(4)`
`NaOH+ZnSO_(4) to underset("soluble")(Na_(2)ZnO_(2))+Na_(2)SO_(4)+2H_(2)O`
`Na_(2)ZnO_(2)+2HCl to 2NaCl+Zn(OH)_(2)darr`
`Zn(OH)_(2)+2HCl to underset("soluble")(ZnCl_(2))+2H_(2)O`
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VK JAISWAL ENGLISH-QUALITATIVE INORGANIC ANALYSIS-LEVEL 3
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  2. An unknown mixture contains one or two of the following: CaCO(3),BaCl(...

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  3. An unknown mixture contains one or two of the following: CaCO(3),BaCl(...

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  4. Aqueous solution of a salt 'A', when mixed with NaoH solution and warm...

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  11. When a crystalline compound X is heated with K(2)Cr(2)O(7) and concent...

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  12. When a crystalline compound X is heated with K(2)Cr(2)O(7) and concent...

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  13. A white solid A reacts with dilute H(2)SO(4) to produce a colourless g...

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  14. A white solid A reacts with dilute H(2)SO(4) to produce a colourless g...

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  15. A white solid A reacts with dilute H(2)SO(4) to produce a colourless g...

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  16. A white solid A reacts with dilute H(2)SO(4) to produce a colourless g...

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  17. A white solid A reacts with dilute H(2)SO(4) to produce a colourless g...

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  18. (i) An aqueous solution of a compound (A) is acidic towards litmus and...

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