Which of the following are not correct? a)Lone pair of electrons prese...
Explanation:
Dipole moment is a measure of the polarity of a molecule. It is a vector quantity because it has both magnitude and direction. The direction of dipole moment is from the positive end to the negative end of the molecule.
Lone pair of electrons present on central atom can give rise to dipole moment:
When a molecule has a lone pair of electrons on its central atom, it can contribute to the dipole moment of the molecule. This is because the lone pair of electrons creates an uneven distribution of charge, with the negative charge being concentrated around the central atom. As a result, the molecule becomes polar and has a dipole moment.
Dipole moment is vector quantity:
Dipole moment is a vector quantity because it has both magnitude and direction. The magnitude of the dipole moment is proportional to the distance between the positive and negative ends of the molecule, as well as the magnitude of the charges on each end. The direction of dipole moment is from the positive end to the negative end of the molecule.
CO2 molecule has dipole moment:
The CO2 molecule is linear in shape, with the carbon atom in the center and two oxygen atoms on either side. Since the molecule is symmetrical, the dipole moments of the two C-O bonds cancel each other out, resulting in a net dipole moment of zero. Therefore, CO2 molecule does not have a dipole moment.
Difference in electronegativities of combining atoms can lead to dipole moment:
When two atoms with different electronegativities combine to form a molecule, the shared electrons are pulled towards the more electronegative atom. This creates an uneven distribution of charge, with the more electronegative atom having a partial negative charge and the less electronegative atom having a partial positive charge. As a result, the molecule becomes polar and has a dipole moment.