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[Fe(H(2)O)(6)]^(2+) is...

`[Fe(H_(2)O)_(6)]^(2+)` is

A

Pale green complex

B

Blue coloured complex

C

Red coloured complex

D

Violet coloured complex

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The correct Answer is:
A
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[Fe(H_(2)O)_(6)]^(3+) is strongly paramagnetic whereas [Fe(CN)_(6)]^(3-) is weakly paramagnetic Explain.

In octahedral complexes having co-ordination number 6, the degeneracy of the d-orbitals of central atom is removed due to ligand electron metal electron repulsions. In the octahedral complex three orbitals have lower energy, t_(2g) set and two orbitals have higher energy, eg set. This phenomenon is formed as crystal field splitting and the energy seperation is denoted by Delta_(0) . Thus the energy of the two eg orbitals will increase by (3//5)Delta_(0) and that of the three t_(2g) will decrease by (2//5)Delta_(0) . The erystal field splitling, Delta_(0) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong field and in these cases, the splitting will be large whereas other produce weak fields and consequently result in small splitting of d-orbitals. Predict the order of Delta_(0) for the following compound i) [Fe(H_(2)O)_(6)]^(+2) ii) [Fe(CN)2(H_(2)O)_(4) iii) [Fe(CN)_(4)(H_(2)O)_(2)]^(2-)

[Fe(CN)_(4)]^(2-) and [Fe(H_(2)O)_(6)]^(2+) are of different colours in dilute solutions. Why ?

Amongst the following ions which one has the highest magnetic moment value? (i) [Cr(H_(2)O)_(6)]^(3+) (ii) [Fe(H_(2)O)_(6)]^(2+) (iii) [Zn(H_(2)O)_(6)]^(2+)

The d-orbitals participating in hybridisation of metal atom may be from the n & (n-1) shell. This depends on the nature of metal and nature of ligand. The complexes involving the inner d-level (inner orbital complexes) results when the ligand is a powerful (or) strong ligand results in a diamagnetic (or) low spin complexes. A weak ligand usually results in the formation of outer orbital complex (or) high spin complex. Number of unpaired electrons present in [Fe(CN)_(6)]^(4-)&[Fe(H_(2)O)_(6)]^(2+) are respectively.

What can be inferred from the magnetic moment values of the following complex species ? {:("Example","Magnetic Moment (BM)"),(K_(4)[Mn(CN)_(6)]," 2.2"),([Fe(H_(2)O)_(6)]^(2+)," 5.3"),(K_(2)[MnCl_(4)]," 5.9"):}

[Ti(H_(2)O)_(6)]^(3+) is coloured while [Sc(H_(2)O)_(6)]^(3+) is colourless. Explain.

The colour of [Ti(H_(2)O)_(6)]^(3+) is due to

The hybridisation of 'Al' in [Al(H_(2)O)_(6)]^(3+) is

Conjugate base of [AI(H_(2),O)_(6)]^(3+), is

AAKASH SERIES-COMPLEX COMPOUNDS -PRACTICE EXERCISE
  1. Optical isomers have A) property of chirality B) almost identical ...

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  2. What is wrong about the following pair of compounds? [Cr(H(2)O)(6)]Cl(...

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  3. Geometrical isomerism is possible in:

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  4. Which of the following has the maximum number of unpaired electrons

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  5. The brown ring complex is formulated as [Fe(H2O)(5)NO^(+)]SO4 The Oxi...

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  6. The oxidation number of Pt in [Pt(C2H4)Cl3]^(-) is

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  7. What is magnetic moment of [FeF6]^(-3) ?

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  8. The hybridisatio nand unpaired electrons in [Fe(H2O)6]^(2+) ion are

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  9. [Fe(H(2)O)(6)]^(2+) is

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  10. Metals those can be extracted with aqueous solution of sodium cyanide ...

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  11. In the process of electroplating, large amounts of Ag^(+) ions can be ...

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  12. In the qualitative analysis of group 3 cations blood red colouration i...

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  13. A recemic substance is composed of

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  14. Basic structure of all Chlorophylls comprises

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  15. Explain the formation of [Co(NH3)6] Cl3 and [Cu(NH3)4] SO4 on the basi...

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  16. Which among the following arrangements are not geometrical isomers ?

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  17. Linkage isomerism may be observed in

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  18. Magnetic moment of the complex [Fe(CN)(6)^(3+) is approximately

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  19. The two compounds [Cr(NH(3))(5) Br]Cl and [Cr(CN(3))(5) Cl]Br can be ...

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  20. The reaction of O(2) and CO with hemoglobin gives

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