Ranking IMF Practice

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules due to the movement of electrons. They are present in all molecules, regardless of polarity.

Front

What are dipole-dipole attractions?

Back

Dipole-dipole attractions are intermolecular forces that occur between polar molecules, where the positive end of one molecule is attracted to the negative end of another.

Front

What are hydrogen bonds?

Back

Hydrogen bonds are a type of strong dipole-dipole attraction that occurs when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.

Front

What are ion-dipole attractions?

Back

Ion-dipole attractions are intermolecular forces that occur between an ion and a polar molecule, where the charged ion interacts with the dipole of the polar molecule.

Front

How do intermolecular forces affect boiling points?

Back

The strength of intermolecular forces directly affects boiling points; stronger intermolecular forces result in higher boiling points, while weaker forces lead to lower boiling points.

Front

What is the relationship between intermolecular forces and melting points?

Back

Similar to boiling points, stronger intermolecular forces result in higher melting points, while weaker forces lead to lower melting points.

Front

Which has a higher boiling point: H2 or NH3?

Back

NH3 has a higher boiling point than H2 due to the presence of hydrogen bonding in NH3.

Front

What is the significance of hydrogen bonds in water?

Back

Hydrogen bonds in water contribute to its high boiling and melting points, surface tension, and unique properties like being less dense as a solid than as a liquid.

Front

What is the effect of molecular size on London dispersion forces?

Back

As molecular size increases, London dispersion forces also increase due to a larger electron cloud, leading to stronger temporary dipoles.

Front

What type of intermolecular force is present in nonpolar molecules?

Back

Nonpolar molecules primarily experience London dispersion forces as their only type of intermolecular attraction.