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In the separation of Cu^(2+) and Cd^(2+)...

In the separation of `Cu^(2+)` and `Cd^(2+)` of Iind group in qualitative analysis of cations, tetraamminecopper (II) sulphate and tetramminecadmium (II) sulphate react with KCN to form the corresponding cyano complex. Which one of the following pairs of the complexes and their relative stability enables the separation of `Cu^(2+)` and `Cd^(2+)` ?

A

`K_(3)[Cu(CN)_(4)]` more stable and `K_(2)[Cd(CN)_(4)]` less stable

B

`K_(2)[Cu(CN)_(4)]` less stable and `K_(2) [Cd(CN)_(4)]` more stable

C

`K_(2) [Cu(CN)_(4)]` more stable and `K_(2)[Cd(CN)_(4)]` less stable.

D

`K_(3) [Cu(CN)_(4)]` less stable and `K_(2)[Cd(CN)_(4)]` more stable.

Text Solution

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The correct Answer is:
A
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MOTION-Salt Analysis-Exercise - 2 (Level-I)
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  2. The brown ring test for NO(2)^(-) and NO(3)^(-) is due to the formatio...

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  3. In the separation of Cu^(2+) and Cd^(2+) of Iind group in qualitative ...

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  4. MATCH THE COLUMN : {:(,"Column - I",,"Column - II"),((A),"Amphoteric...

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  5. Which of the following sulphate is insoluble in water ?

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  6. Which of the following metal sulphides has maximum solubility in water...

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  7. The compound formed in the borax bead test of Cu^(2+) ion in oxidising...

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  8. Identify the correct order of solubility of Na(2)S,CuS and ZnS in aque...

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  9. A mixture of two salts is not water soluble but dissolves completely i...

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  10. A green ore (A) of a metal present as a double /mixed compound is trea...

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  11. A green ore (A) of a metal present as a double /mixed compound is trea...

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  12. A green ore (A) of a metal present as a double /mixed compound is trea...

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  13. Three separate samples of a solution of a single salt gave these resul...

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  14. Which one of the following ionic species will impart colour to an aque...

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  15. Which is not dissolved in dil. HCl?

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  17. Which of the following leaves no residue on heating ?

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  18. A metal X on heating in nitrogen gas gives Y,Y on treatment with H(2)O...

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  19. Which of the following gives blood red colour with KCNS?

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  20. Which of the following is (are) soluble in excess of NaOH ?

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