Q. 225.0( 1 Vote )

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Answer :

a) Theatomic number of Iron (Fe) is Z = 26

The electronic configuration of 26Fe= [Ar] 3d6 4s2

Oxidation number of Fe in [Fe(CN)6]4- is

Let oxidation number of Fe is x

x + (-1) × 6 = -4

x-6 = -4

x = -4 +6

x = 2

Thus, the electronic configuration of Fe2+=[Ar] 3d6

The formation of [Fe(CN)6]4- may be explained through hybridization as follows:

Hybridization: d2sp3

Magnetic character: Diamagnetic (no unpaired electrons)

Spin: Low spin (inner d-orbitals are used for the pairing)

b) The geometrical isomers of the complex [Pt(en)2Cl2]2+ which is optically inactive is given below

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