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Copper sulphate dissolves in excess of K...

Copper sulphate dissolves in excess of KCN to give :

A

`[Cu(CN)_(4)]^(3-)`

B

`[Cu(CN)_(4)]^(2-)`

C

`Cu(CN)_(2)`

D

CuCN

Text Solution

Verified by Experts

The correct Answer is:
A
`[Cu(CN)_(4)]^(3-)` is formed
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MODERN PUBLICATION-CHEMISTRY OF D-AND F-BLOCK ELEMENTS-Multiple Choice Questions (Level-II)
  1. Four sucessive members of the first two transition elements are listed...

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  2. The aqueous solution containing which one fo the following ions will b...

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  3. Copper sulphate dissolves in excess of KCN to give :

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  4. Which is not correct about the chemistry of 3d and 4f series elements ...

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  5. The approximate percentage of iron in mischmetal is :

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  6. To an acidic solution of anion a few drops of acidified KMnO(4) are ...

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  7. The electronic configuration of transition element "X", is +3, oxidati...

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  8. The magnetic nature of elements depends on the presence of unpaired el...

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  9. Which of the following is amphoteric oxide ? Mn(2)O(7), CrO(3), Cr...

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  10. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the...

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  11. KMnO(4) acts as an oxidising agent in alkaline medium. When alkaline K...

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  12. Although Zirconium belongs to 4d transition series and Hafnium to 5d t...

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  13. Why is HCl not used to make the medium acidic in oxidation reactions ...

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  14. In a reaction K(2)MnO(4) is converted into KMnO(4) The change in the ...

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  15. The stable oxidation state of Ce (Z = 58) is

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  16. In the reaction : CrO(4)^(2-) + X to Cr(2)O(7)^(2-) X is

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  17. In which of the following pairs, the atomic size is almost the same ?

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  18. Which of the following statement is not correct ?

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  19. In the standarization of Na(2)S(2)O(3) using K(2)Cr(2)O(7) by iodome...

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  20. In the preparation of KMnO(4) pyrolusite (MnO(2)) is first converted t...

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