Which of the following is the best explanation that CO2 is non polar molecule __________________?
Correct answer: B. Dipole moment is zero
- A. Linear geometry
- B. Dipole moment is zero
- C. Sp hybridization
- D. None
Explanation
CO2 is linear and symmetrical, so the two equal C=O bond dipoles point in opposite directions and cancel, giving a net dipole moment of zero. Thus zero dipole moment is the most direct explanation for its non-polar nature, while linear geometry is the structural reason for that cancellation. Students may choose a because they identify the shape but do not state the resulting molecular property.
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About Dipole Moment
Dipole moment measures the separation of positive and negative charge in a bond or molecule, with magnitude related to charge and distance, μ = q r. Questions distinguish polar bonds from polar molecules by considering bond direction, molecular geometry and whether individual bond moments cancel through symmetry.
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