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Which compound is formed when excess KCN...

Which compound is formed when excess `KCN` is added to aqueous solution of copper sulphate?

A

`Cu(CN)_(2)`

B

`K_(2)[Cu(CN)_(4)]`

C

`K[Cu(CN)_(2)]`

D

`K_(3)[Cu(CN)_(4)]`

Text Solution

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The correct Answer is:
D
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GRB PUBLICATION-SALT ANALYSIS-H: IInd Group Cations
  1. Which cation forms an insoluble chloride and an insoluble sulphide?

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  2. Select reaction in which oxidation number of copper is not changed in ...

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  3. Which compound is formed when excess KCN is added to aqueous solution ...

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  4. Consider the following statements: Statement-1: Cu^(2+) ions are red...

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  5. Chocolate brown precipitate is formed with:

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  6. When concentrated HCI is added to an aqueous solution of CoCl(2...

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

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  8. Compound A,B and C are respectively:

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  9. Sometimes yellow turbidity appears while passing H(2)S gas even in sli...

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  10. H(2)S in the presence of HCl precipitates II group but not IV group be...

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  11. Yellow ammonium sulphate solution is a suitable reagent for the separa...

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  12. In which of the following pairs the precipitates are red and black col...

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  13. Which one of the following salts will produce clear and transparant or...

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  14. A metal chloride original solution (i.e, O.S) on mixing with K(2)CrO(4...

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  15. Which of the following in insoluble in dil. HNO(3) but dissolves in aq...

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  16. When small amount of SnCl(2) is added to a solution of Hg^(2+) ions, a...

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  17. Which of the following reagents gives white precipitate with Hg(NO(3))...

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  18. When excess of dilute NH(4)OH is added to an aqueous solution of coppe...

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  19. A black sulphide is formed by the action of H(2)S on:

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  20. When bismuth chloride is poured into a large volume of water the white...

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