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Which one of the following has lowest va...

Which one of the following has lowest value of paramagnetic behaviour?

A

`[Cr(CN)_(6)]^(3-)`

B

`[Mn(CN)_(6)]^(3-)`

C

`[Fe(CN)_(6)]^(3-)`

D

`[Co(CN)_(6)]^(3-)`

Text Solution

Verified by Experts

`CN^(-)` ion is a strong field ligand . It will cause the pairing of all the 3d-orbitals (`d^(6)`) in `Co^(3+)` ion. In the absence of the unpaired electrons, magnetic moment of complex will be zero.
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DINESH PUBLICATION-CO-ORDINATION COMPOUNDS -Select the correct answers
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  2. Which of the following compounds shows optical isomerism ?

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  3. Which one of the following has lowest value of paramagnetic behaviour?

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  4. Which of the following has a square planar geometry? .

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  5. The coordination number of a central metal atom in a complex is determ...

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  6. The correct order of magnetic moments (spin values in B.M.) among is:

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

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  8. In Fe(CO)5, the Fe-C bond possesses:

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  9. In which of the following octahedral complexes of Co (at. no. 27), wil...

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  10. The co-ordination number and the oxidation state of the element E in t...

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  11. Which of the following complexes will give a pair of enantiomers ?

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  12. Which of the following pairs represents linkage isomers ?

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  13. Which of the following exists as an optical isomer ?

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  14. A solution containing 2.675 g of CoCl(3).6NH(3) (molar mass = 267.5 g ...

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  15. The IUPAC name of the K(2)[Ni(CN)(4)] is :

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  16. The oxidation number , d-orbital occupation and co-ordination number o...

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  17. Which of the following facts about the complex [Cr(NH(3))(6)]Cl(3) is...

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  18. The correct statement with respect to the complexes Ni(CO)(4) and [Ni(...

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  19. The complex with maximum magnetic in the following is :

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  20. Which among the following will be named as dibromobis (ethane-1,2-diam...

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