Intermolecular forces Practice

Front

What is hydrogen bonding?

Back

Hydrogen bonding is a type of attractive interaction that occurs when a hydrogen atom bonded to a highly electronegative atom (like N, O, or F) is attracted to another electronegative atom in a different molecule.

Front

Which molecules can participate in hydrogen bonding?

Back

Molecules that have hydrogen atoms bonded to nitrogen (N), oxygen (O), or fluorine (F) can participate in hydrogen bonding.

Front

How do intermolecular forces affect boiling points?

Back

The weaker the intermolecular forces of a substance, the lower the boiling point.

Front

Which substance has the highest boiling point: H2, NH3, N2, O2?

Back

NH3 (ammonia) has the highest boiling point due to strong hydrogen bonding.

Front

What explains the high melting and boiling point of water?

Back

The relatively high melting and boiling point of water is explained by strong hydrogen bonds between water molecules.

Front

What are dipole-dipole interactions?

Back

Dipole-dipole interactions are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary shifts in electron density in nonpolar molecules.

Front

What is the relationship between molecular size and London dispersion forces?

Back

As molecular size increases, London dispersion forces generally increase due to a larger electron cloud.

Front

What is a polar molecule?

Back

A polar molecule is a molecule that has a net dipole moment due to the presence of polar bonds, resulting in a positive and a negative end.

Front

What is a nonpolar molecule?

Back

A nonpolar molecule is a molecule that does not have a net dipole moment, often due to symmetrical distribution of charge.