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Question

In which of the following compounds transition metal is in oxidation state zero


A
[Co(NH3)6]Cl2
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B
[Fe(H2O)6SO4]
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C
[Ni(CO)4]
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D
[Fe(H2O)3](OH)2
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Solution

The correct option is C $$\left[ \mathrm { Ni } ( \mathrm { CO } ) _ { 4 } \right]$$
Nickel shows zero oxidation state in carbonyl complex as $$CO$$ ligand has $$0$$ charge and complex as a whole also has $$0$$ charge. So, central metal atom has $$0$$ charge.

Chemistry

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