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Answer: The formal charge of carbon monoxide can be determined for the Lewis structure given below.
:C ≡O :
Given that oxygen is divalent and carbon is tetravalent in nature,
The pair of electrons in carbon has three bonds with oxygen which equates to carbon’s formal charge being 4-5 = -1
The formal charge of oxygen becomes +1.
Therefore, carbon monoxide’s net formal charge = -1+1 = 0
Hence, the formal charge of CO is 0.
