MCQ
Which of the following is wrong statement
- ✓$Ni{(CO)_4}$ has oxidation number $+ 4 $ for $Ni$
- B$Ni{(CO)_4}$ has zero oxidation number for $ Ni$
- C$ Ni$ is metal
- D$CO$ is gas
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image $\xrightarrow{{[O]}}A\xrightarrow{{SOC{l_2}}}B\xrightarrow{{Na{N_3}}}C\xrightarrow{{{\text{Heat}}}}D$

