Carbon monoxide is one of the products of incomplete combustion. How many bonds does carbon monoxide have?
Correct answer: C. 3
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
Carbon monoxide, or CO, has one carbon atom and one oxygen atom. In its Lewis dot structure, the carbon atom is triple-bonded to the oxygen atom, meaning there are three bonds between the two atoms. Therefore, the correct answer is option C) 3.
This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.
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A sigma bond forms by direct end-to-end overlap along the internuclear axis, whereas a pi bond forms by sideways overlap of parallel orbitals. The topic covers single, double and triple bonds, bond composition, restricted rotation and the relation between sigma and pi bonding and orbital hybridisation.
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