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: B
Solution :
Oxidation state of Ni in\[Ni{{(CO)}^{4}}\]. \[Ni{{(CO)}^{4}}=0\] \[x+4\times 0=0\] (\[\because \]CO is neutral species) \[x=0\]
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