BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Carbon and oxygen have the same electronegativity.
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There is bond symmetry and the dipoles balance one another.
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Oxygen atoms have more electrons than carbon atoms.
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The two oxygen atoms form a nonpolar bond with one another.
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Detailed explanation-1: -Since carbon C and oxygen O have different electronegativities, electrons aren’t shared equally between them. There is no net molecule dipole moment since the two bond dipole moments cancel out. Thus, carbon dioxide is a non-polar gas.
Detailed explanation-2: -Symmetrical molecules are nonpolar. Because nonpolar molecules share their charges evenly, they do not react to electrostatic charges like water does. Covalent molecules made of only one type of atom, like hydrogen gas (H2), are nonpolar because the hydrogen atoms share their electrons equally.
Detailed explanation-3: -They’re exactly equal and opposite because it’s a perfectly linear molecule molecule, and the bonds the oxygen’s on either side are identical.
Detailed explanation-4: -Carbon dioxide is a linear molecule while sulfur dioxide is a bent molecule. Both molecules contain polar bonds (see bond dipoles on the Lewis structures below), but carbon dioxide is a nonpolar molecule while sulfur dioxide is a polar molecule.
Detailed explanation-5: -CO2 has the structure as O=C=O. in which there is bond dipole moment (C-O bond). But, as the dipole moment of one bond is cancelled by other, the structure of CO2 is a linear. So, CO2 has zero dipole moment because it is a linear molecule.