Chemistry · Chemical Bonding
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_______ has dipole moment.
- A
CO
- B
CO2
- C
Benzene
- D
All of these
In the free carbon monoxide molecule, a net negative charge δ– remains at the carbon end and the molecule has a small dipole moment of 0.122 D.
a) CO (Carbon Monoxide): This is the correct option. Carbon monoxide (CO) has a dipole moment. A dipole moment arises in a molecule when there is an unequal distribution of charge due to differences in electronegativity between atoms. In CO, the carbon and oxygen atoms have different electronegativities, resulting in a polar covalent bond and a dipole moment.
b) CO2 (Carbon Dioxide): Carbon dioxide (CO2) does not have a dipole moment. Although CO2 has polar covalent bonds, the symmetrical linear arrangement of the two oxygen atoms around the central carbon atom cancels out the overall dipole moment, making the molecule nonpolar.
c) Benzene: Benzene (C6H6) is a symmetrical hexagonal ring structure composed of carbon and hydrogen atoms. It has a delocalized electron cloud, which gives it a uniform distribution of charge and makes it a nonpolar molecule. Therefore, benzene does not have a dipole moment.
d) All of These: This option suggests that all of the mentioned molecules (CO, CO2, and benzene) have dipole moments. However, as explained above, only carbon monoxide (CO) has a dipole moment.
Tagged under Chemistry · Chemical Bonding · 2008