Question detail

What distinguishes a polar molecule from a non-polar molecule?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Bonding

Question

A. The presence of polar bonds
B. The molecular shape and symmetry
C. The type of atoms involved
D. The overall charge of the molecule

Answer

The molecular shape and symmetry

Explanation

A polar molecule is defined as a molecule that has a net dipole moment due to its shape and the arrangement of polar bonds. The key difference is that polar molecules have an asymmetrical shape, which prevents the dipole moments from canceling out, while non-polar molecules are symmetrical, allowing dipole moments to cancel. This distinction is crucial when determining the polarity of a molecule. Thus, the correct option highlights the importance of molecular shape and symmetry.

Common mistake

Distinguishing Polar Bonds and Polar Molecules

Students often confuse polar bonds with polar molecules, thinking that all molecules with polar bonds are polar.

A polar bond occurs when there is a difference in electronegativity between the atoms, leading to a dipole. A polar molecule has an overall dipole moment due to the arrangement of its polar bonds. To distinguish them, remember that a molecule can have polar bonds but be non-polar if the dipoles cancel out due to symmetry.

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