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Question

The effective atomic number of central metal ion is wrongly calculated in the following complex?


A
In [Ni(CO)4] the EAN of Ni is 36
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B
In K2[Ni(CN)4] the EAN of Ni is 36
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C
In K3[Fe(CN)6]the EAN of Fe 35
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D
In [Cr(NH3)6]Cl3 the EAN of Cr is 33
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Solution

The correct option is B In K2[Ni(CN)4] the EAN of Ni is 36
EAN value of complexes as follows by using formula ZX+Y
Where Z= Atomic number of metal ion
X = oxidation state of metal ion
Y = number of electrons donated by ligands
  1. =280+8=36
  2. =282+8=34
  3. =263+12=35
  4. =243+12=33
Option B is correct.

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