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Q.

In which of the following coordination compounds, the central metal ion is in zero oxidation state?

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a

 [Fe (H2O)6] Cl3 

b

 K4[Fe (CN)6] 

c

Fe (CO)5 

d

 [Fe(H2O)6]Cl2

answer is C.

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Detailed Solution

The oxidation number of Fe in [Fe(CO)5] is:

x+0(5)=0  

x=0  

Hence the correct answer is   [Fe(CO)5].

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