A) \[Ni{{(CO)}_{4}}\]has oxidation number +4 for \[Ni\]
B) \[Ni{{(CO)}_{4}}\]has zero oxidation number for\[Ni\]
C) \[Ni\]is metal
D) CO is gas
Correct Answer: A
Solution :
In\[Ni{{(CO)}_{4}},\]carbonyl group is a neutral species. So oxidation number of Ni is zero. \[Ni{{(CO)}_{4}}\] \[x+4\times 0=0\] \[\therefore \] \[x=0\]
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