Question detail

Which factor primarily affects the strength of London dispersion forces?

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

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Bonding

Question

A. The size of the molecules
B. The polarity of the molecules
C. The temperature of the substance
D. The presence of hydrogen bonds

Answer

The size of the molecules

Explanation

The strength of London dispersion forces increases with the size of the molecules because larger molecules have more electrons, leading to greater polarizability and stronger temporary dipoles.

Common mistake

Misunderstanding London Dispersion Forces

Students often confuse London dispersion forces with stronger intermolecular forces like hydrogen bonds, thinking they have similar strengths.

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules. To clarify, remember that these forces increase with molecular size and surface area. For example, larger molecules have more electrons, leading to stronger temporary dipoles and thus stronger London dispersion forces. Always compare them to other forces to understand their relative weakness.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move