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In [NiCl(4)]^(2-) ,the number of unparie...

In `[NiCl_(4)]^(2-)` ,the number of unparied electron is

A

B

C

D

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The correct Answer is:
B
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Valence bond theory successfully explains the magnetic behaviour of complexes. The substances which contains unpaired electrons. and paramagnetic character increases as the mumber of unpaired electrons increases. Magnetic moment of a complex can be determined experimentally and by using formula sqrt(n(n+2)) and we can determine the number of unpaired electrons in it. This information is important in writing the electronic structure of complex which in turm is also useful in deciding the geometry of complex. The magnetic moments (spin only) of [NiCl_(4)]^(2-) and [Ni(CN)_(4)]^(2-) are:

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Among [Ni(CO)_(4)], [NiCl_(4)]^(2-), [Co (NH_(3))_(4) Cl_(2)] Cl, Na_(3) [CoF_(6)], Na_(2)O_(2) and CsO_(2) , the total number of paramagnetic compounds is

NCERT FINGERTIPS-COORDINATION COMPOUNDS -Bonding In Coordination Compounds
  1. Which of the following complexes will show maximum paramagnetism ?

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  2. Match the column I with column II and mark the appropriate choice .

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  3. Electronic configuration of [Cu(NH(3))(6)]^(2+) on the basis of crysta...

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  4. Which of the following energy level diagram for [FeF(6)]^(3-) is corre...

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  5. In [NiCl(4)]^(2-) ,the number of unparied electron is

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  6. Which of the following shell from an octahedral complex

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  7. The value of 'spin only' magnetic moment for one of the following conf...

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  8. Which of the following statements is/are correct ? (i) In octahedra...

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  9. [FeF(6)]^(3-) is paramagnetic due to presence of unpaired electrons in...

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  10. [Co(Cr(2)O(4))(3)]^(3-) is a

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  11. What are the correct oxidation state , coordination number , configura...

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  12. Which of the following statements is correct about [Co(H(2)O)(6)]^(2+)...

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  13. The increasing order of the crystal field splitting power of some comm...

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  14. What is crystal field splitting energy? How does the magnitude of tria...

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  15. Why are low spin tetrahedral complexes not formed ?

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  16. A substance appears coloured because

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  17. Match the complex ions given in column I with their colour given in co...

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  18. CuSO(4).5H(2)O is blue in colour while CuSO(4) is colourless. Why ?

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  19. [Fe(CN)(6)]^(4-) and [Fe(H(2)O)(6)]^(2+) are of different colours in d...

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  20. Explain why hexacayano complexe of metals in their +2 oxidation state ...

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