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Nickel (Z=28) combines with a uninegativ...

Nickel `(Z=28)` combines with a uninegative monodentate ligand `X^(-)` to form a paramagnetic complex `[NiX_4]^(2-)`. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively:

A

one , square planar

B

Two , square planar

C

one , tetrahedral

D

two, tetrahedral

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The correct Answer is:
D
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TARGET PUBLICATION-COORDINATION COMPOUNDS-COMPETITIVE THINKING
  1. The hybridization involved in complex [Ni(CN)(4)]^(2-) is (At. No . Ni...

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  2. The complex ion which has no.'d' electrons in the central metal atom i...

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  3. Nickel (Z=28) combines with a uninegative monodentate ligand X^(-) to ...

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  4. The magnetic moment (spin only) of [NiCl(4)]^(2-) is

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  5. The d-electron configurations of Cr^(2+), Mn^(2+), Fe^(2+) and Co^(2+)...

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  6. Both [Ni(CO)4] and [Ni (CN)4]^(2-) are diamagnetic The hybridisation...

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  7. Which of the following spectrochemical series is TRUE ?

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  8. In which of the following coordination entities the magnitude fo Delta...

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  9. What type of hybridisation is involved in [Fe(CN)6]^(3-) ?

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  10. Which of these statements about [Co(CN)6]^(3-) is true?

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  11. Which of the following complexes is paramagnetic

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  12. Which one of the following complexes has highest magnetic moment value...

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  13. The pair having the same magnetic moment is. [ At. No. :Cr = 24, Mn ...

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  14. Which of the following complex ions is expected to absorb visible ligh...

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  15. Which of the following complex ions is not expected to absorve visible...

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  16. How many out of [TiF6]^(2-), [CoF6]^(3-) , Cu2Cl2 and [NiCl4]^(2-) are...

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  17. Correct increasing order for the wavelengths of absorption in the visi...

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  18. Finely divided iron combines with CO to give .

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  19. Which of the following has the highest stability constant at 298 K ?

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  20. CuSO4 , solution with excess of KCN gives .

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