CO2 Molecule.?

Question: The CO2 molecule is linear, the electronegativities of C and O are 2.5 and 3.5 respectiviely. Based on these values and on the consideration of molecular geometry. The C-O bond is ___ and the molecule is_____. Why? a)polar,polar b)non-polar, non-polar c)polar,non-polar d)non-polar,polar e) none of these.

Answer: The individual C=O bonds are polar because of the differences in the electronegativities of C and O. However, the molecule is linear. Since the bond polarities are oriented 180 degrees apart, there is not resulting net dipole in the molecule, and so CO2 is a non-polar molecule. C is the correct answer.

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