Answer:
(i) Oxidation
number of Cr = 0
Cr (24) [Ar] 3d5 4s1
Cr (when complexing with CO)
Electrons
donated by ligands CO. Hybridisation d3sp3 Inner
d-orbital complex Unpaired electron = zero
Thus, diamagnetic in nature. [1]
(ii)
For a given ion and ligand, greater the charge on the metal ion, greater
the stability. Thus, [1]
(iii) Various factor affecting crystal field splitting Nature
of the ligand Which have been arranged in increasing field strength as
(b) Geometry of the complex values (of
tetrahedral complex) is about 50% compared to value of octahedral complex).
(c) Nature of metal ion
3d :high spin 4d,5d,: low spin
(d) Oxidation state of metal ion
[1]
Thus, greater the charge on metal ion, greater the value
of .
Ligand
CN 6
ON of Fe +2
6
+3
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