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 :
\[Ni\,{{(CO)}_{4}}\]has O.N. zero for \[Ni\].
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