• # question_answer 80) Carbon monoxide acts as a Lewis base because it has A)  a double bond between C and O atoms.B)  a triple bond between C and O atoms.C)  a lone pair of electrons on the C atomD)  two lone pairs of electrons on the O atom.

Carbon monoxide has the structure; $:C=O:$ If forms metal-carbon bond and thus donate its lone pair on carbon to metal in metal carbonyls and behaves as a Lewis base.