BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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H2O
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CaCl2
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SF3
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CO2
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Detailed explanation-1: -CO2 is non polar while SO2 is polar molecule.
Detailed explanation-2: -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-3: -In CO2 molecule, CO bond is polar but CO2 molecule is non-polar because the vector sum of Dipole moment of the two CO bond is zero.
Detailed explanation-4: -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-5: -Hence, this molecule is non polar despite the presence of polar-covalent bonds. Hence, the correct option is CO2 C O 2 .