AP BIOLOGY

Detailed explanation-1: -Not all molecules having polar bonds are polar. An example is linear carbon dioxide molecule (CO2). The individual C−O bonds are polar but the molecule on the whole is non polar as individual bond dipoles cancel each other.

Detailed explanation-2: -A polar molecule always contains polar bonds, but some molecules with polar bonds are nonpolar.

Detailed explanation-3: -Answer and Explanation: YES, a nonpolar molecule can contain polar bonds. The polarity of a molecule depends on the net dipole moment of the molecule.

Detailed explanation-4: -Generally, molecules with oxygen atoms, nitrogen atoms, or ionizable groups (-CO2H and-SO3H) tend to be polar. Nonpolar molecules are those that do not possess regions of positive and negative charge. Ethane is an example of a nonpolar material.

Detailed explanation-5: -Yes. A molecule in which the polar bonds are arranged symmetrically so that the individual bond dipole moments will cancel out each other will be a nonpolar molecule.