A) +1
B) +2
C) - 1
D) - 3
Correct Answer: C
Solution :
Suppose that the oxidation number of cobalt is x. Then, \[+1+x+4\times 0=0\] or \[x+1=0\] or \[x=-1\] Thus, \[K[Co{{(Co)}_{4}}]\]You need to login to perform this action.
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