Which of the following statements is true about polarity?

• A. All molecules with polar bonds are polar.
• B. A nonpolar molecule has only nonpolar bonds.
• C. The shape of a molecule is important in determining the molecular polarity.
• D. The greater the difference in electronegativity between two atoms in a bond, the smaller the magnitude of polarity.
• E. All of the above are true statements.

Answer: (C)

Verified step by step guidance

1. Understand the concept of polarity: Polarity in chemistry refers to the distribution of electrical charge over the atoms joined by the bond. A polar bond occurs when there is a significant difference in electronegativity between the two atoms involved.
2. Evaluate the statement 'All molecules with polar bonds are polar': This is not necessarily true. A molecule can have polar bonds but still be nonpolar overall if the molecular geometry allows for the dipoles to cancel each other out.
3. Evaluate the statement 'A nonpolar molecule has only nonpolar bonds': This is incorrect. A nonpolar molecule can have polar bonds if the molecular geometry results in the dipoles canceling each other out.
4. Evaluate the statement 'The shape of a molecule is important in determining the molecular polarity': This is true. The molecular geometry determines how the dipoles from polar bonds are arranged and whether they cancel out or result in a net dipole moment.
5. Evaluate the statement 'The greater the difference in electronegativity between two atoms in a bond, the smaller the magnitude of polarity': This is incorrect. A greater difference in electronegativity typically results in a larger magnitude of polarity.