Dipole Moment

CO₂ has polar bonds but is a NON POLAR molecule. Why?

• it has an asymmetrical shape

• bond polarity or dipole moment between C and O atoms cancel

• there is net dipole moment between C and O atoms in molecule

• bond polarity does not exist between C⁺ and O^- atoms

Is this molecule polar or nonpolar? REMEMBER: This is a lewis structure, NOT A VSEPR STRUCTURE. Think about its VSEPR first!

• Non-polar

• Polar

At any certain time the shift in the position of the electrons in an atom will likely create temporary positive and negative poles. Which among the following is this kind of dipole?

• a. dipole forces

• b. dipole moment

• c. dispersion forces

• d. instantaneous dipole

Carbon dioxide (CO2) is an example of a non-polar molecule due to its linear molecular geometry and symmetrical distribution of polar bonds, resulting in a net dipole moment of zero. Which of the following is the structure of a non-polar molecule?

• a. Bent

• b. Trigonal pyramidal

• c. Linear

• d. Trigonal planar

Tags

NGSS.HS-PS2-6

How is instantaneous dipole best described?

• a. It arises from the high polarization of the atoms or molecules.

• b. It is a permanent dipole induced by polar molecules to ions.

• c. It is the strongest attractive force between and among molecules.

• d. It results in the formation of temporary dipoles induced to atoms or molecules.

Which of the following molecules has a non-zero dipole moment?

• Carbon dioxide (CO2)

• Water (H2O)

• Methane (CH4)

• Boron trifluoride (BF3)

What is the unit of dipole moment in the International System of Units (SI)?

• Coulomb-meter

• Newton-meter

• Joule-second

• Pascal

Which of the following statements is true about dipole moments?

• Dipole moment is a vector quantity.

• Dipole moment is a scalar quantity.

• Dipole moment is always zero for polar molecules.

• Dipole moment is independent of molecular geometry.

Tags

NGSS.HS-PS2-6

NGSS.HS-PS3-5

In which of the following molecules is the dipole moment zero due to its symmetrical shape?

• Ammonia (NH3)

• Water (H2O)

• Carbon tetrachloride (CCl4)

• Sulfur dioxide (SO2)

Which of the following factors does NOT affect the dipole moment of a molecule?

• Electronegativity difference between atoms

• Molecular geometry

• Bond length

• Molecular mass